There was no shortage of TV series that were left on the brink of cancellation - last month when we asked iReporters which of the shows “on the bubble” they wanted to see saved.

However, just like “Chuck” in 2009, one show emerged above the rest.

“Nikita,” the action adventure series which finishes its second season Friday on the CW (which is partially owned by Time Warner, owner of CNN), was far and away the most popular “bubble” series on iReport.

“‘Nikita’ is one of the most underrated TV shows on air,” said Sandi Leung of Toronto, Ontario.

“It's one of the rare shows that is filled with its action packed scenes, comedy, romance, and so much more. It incorporates so many different elements, which makes it a perfectly balanced show.”

Leung is such a fan that she has actually met several cast members, including Maggie Q and Lyndsy Fonseca, at home in Toronto (where the show is produced).

“It has so much more to give, and only giving the show two seasons wouldn't be enough,” she posted to iReport.

The great news for fans like Leung is that “Nikita” will continue to give: A third season, thanks in part to these fans’ efforts on social media, was picked up by the CW on Friday.

Nina Talverdian of Los Angeles was another of the many who sung the show’s praises on iReport.

“’Nikita’ has well-rounded eye-catching characters with acting talent and sex appeal; impressive stunts that would blow anyone away and a refreshing plot that unexpectedly twists and turns,” she said.

Deanna Wigney of Ottawa, Ontario - who considers herself a member of the “Nikitaverse” fan group – agrees: “This show is pretty much my escape from reality, and I know it is for other people as well.

“Our protagonist is strong and complex, and her acting is fabulous. [‘Nikita’] has amazing writing, outstanding cast members and the stunts are so cool!”

Leung added, “You can’t ignore the stunts,” pointing out that Maggie Q does her own stunt work.

In response to these fans mobilizing on iReport, show creator Craig Silverstein told CNN, “Thanks to all our fans who succeeded in the effort to save ‘Nikita!’  You will be remembered and showered with rewards.”

Are you a "Nikita" fan? Post your thoughts on the show's renewal below, and stay tuned in 2013 for another "Save my show" assignment.

We asked what issues matter to you this election.

More than 400 people participated. Between the personal stories and the breadth of topics, we were overwhelmed with the response to part one of the iReport Debate.

From your iReports, CNN identified the top 20 themes. Now we’re asking you to help us narrow down the field.

Drag and drop the issues here to rank them by importance to you. Submit your vote for the top 10, and your votes will determine what issues make it to the next round of the iReport Debate.

Voting will close at 11:59 p.m. ET on May 23. The top four to six issues will make it to the next round of the iReport Debate – and that's when the real debating begins! We'll invite you to share your views on those topics and go head-to-head with other iReporters around the country.

If you feel your top issue is not represented in the list, we encourage you to let us know. Feel free to sound off with your top pick.

Thanks for your participation so far. We’re excited to move into the next part of the debate, so don’t forget to vote! If you’ve got any questions, feel free to leave a comment below.

Yesterday, the Occupy movement kicked off a planned renaissance – an "American Spring" – as thousands of demonstrators took the streets of cities around the world. The protests took place on May 1 in solidarity with International Workers Day, a holiday meant to commemorate the struggles of laborers and working-class folks around the world.

Occupiers were largely dormant during the winter months, which led many to speculate that the movement had fizzled out. CNN published an op-ed by Amitai Etzioni this morning arguing that yesterday's "underwhelming" protests were proof-positive of this assertion.

But iReporters told a different story.

Occupiers massed in New York City's Union Park and marched down Broadway for several hours, straight through the heart of Manhattan. Photographer Joel Graham initially went to the march as a neutral observer, but admitted he began to feel an emotional connection to the demonstrators:

"At the Vietnam memorial, a chant broke out: 'Antagonize! Antagonize! Antagonize!' My impression is that the Occupiers plan on sustaining their efforts until change is made," he said. "There is some concern that some smaller radical groups might manipulate the protests by provoking violence but I don't get the impression (just the opposite) that the Occupiers want that reputation."

Bostonian Adam C. Powell had a similar experience. He was on his way home last night when he saw a group of Occupiers marching through Copley Square. “I hope that by sharing this clip, I will help others see the current level of unrest in America. While it is debatable whether the protesters are right or wrong, the one thing that is clear is that they are unhappy,” he said.

Pastor Reginald C. Norman, Jr. documented the protests in downtown Los Angeles, California. He shot these portraits of demonstrators assembling and readying for a march through the center of the city. "It seems that [the Occupiers] are frustrated with the slow progress of changing things for the better, but they haven't given up hope," he said.

And on the other side of the pond, photographer Teresa Teixeira witnessed and participated in street demonstrations in Lisbon, Portugal, loosely connected to the U.S. Occupy movement.

"The demonstrators seemed strong in their convictions, but this day was specially used to show the people's discontent, and an alert to the government," she said. "There is obviously the will to carry on future changes, and these have to be guaranteed by the people organized in groups of interest, not the government any more!"

Are there Occupy protests in your area? CNN iReport wants to hear from you: Share your photos and videos, or tell us what you think about the movement.

In honor of Arbor Day, we invited iReporters to share their favorite tree photos.

This tree's curling trunk and branches against the bright blue sky and green grass at the Washington Park Arboretum in Seattle, Washington, caught Jim McClure’s eye in early April.

“I love the variety of structure and textures trees provide, especially when back light with sun,” McClure said. “I tried to capture just the right amount of texture on the trees, yet maintain a touch of silhouette.”

In Hershey, Pennsylvania, wedding photographer Ali Waxman captured a row of trees in the early morning fog a month ago.

The sight of this bare tree at a winery in Sonoma, California, reminded Ruth Rutherford of hope.

“It's barren, but it will soon be in full bloom, just like the rows of grape vines in the background. Today might not be the best day, but tomorrow will be better,” said Rutherford, who lives in Washington, D.C. and shot the photo with her iPhone in early March.

Thank you to everyone who contributed to this assignment, and have a look at the rest of the Arbor Day submissions here.

Tomorrow marks a big day for space shuttle Discovery: The shuttle will take the last flight of its career. Discovery is headed from Kennedy Space Center in Florida to the Smithsonian National Air and Space Museum, just outside Washington, D.C., where it will transition from explorer to educator.

To celebrate the shuttle's final flight, we're partnering with NASA and the Smithsonian to track Discovery's journey from Florida to Washington. That's where you come in: If you're in the southeastern U.S., we want you to join other space enthusiasts to try to spot the shuttle during its trip tomorrow and share your photos on CNN iReport!

If you'd like to participate, here's what you need to know:

The shuttle will leave from Kennedy Space Center in Florida at dawn (around 7 a.m.), weather permitting. It will fly over the KSC visitor center, Patrick Air Force Base, and the Space Coast beaches before making its way up the coast (for security reasons, NASA cannot release the exact flight path). Between 10 and 11 a.m., NASA plans to have the shuttle fly over Washington, D.C., including several major landmarks, before it lands at Dulles airport for transfer to the museum. If you're in the D.C. area, the Smithsonian has some tips for you on the best places to view the shuttle.

Discovery will ride on top of a specially modified 747 for the journey to the Smithsonian. The pair will fly quite low, around 10,000 feet, for the entire journey. So as long as the weather is reasonably nice, they should be visible for the entire flight.

Be sure to upload your images to our Space to Smithsonian assignment. We'll plot the best of them on a map for CNN.com, and NASA and the Smithsonian will share them with literally millions of followers on social media! If you share your images on Twitter or Instagram, be sure to tag them #spottheshuttle.

So, set your alarm and prep your camera, because tomorrow is your last chance to #spottheshuttle!

When CNN.com’s Health and Living writers gathered to brainstorm story ideas for a series on beauty, we figured it would be quick and easy … then we started talking.

Our writers came up with tons of angles to cover -- how the brain determines what’s beautiful; the media’s role in defining beauty; body image issues for kids and teens; the growing diet industry for men; learning to love your beauty quirks; and whether or not there would ever be another all-American beauty.

In the end, we launched a six-week series. We called it "Perceptions of Beauty."

We also knew we couldn't truly try to define beauty without asking our readers. In two weeks we received more than 90 responses to our question: What does beauty mean to you?

From there, we partnered 10 iReporters from around the world, connected them via Skype and asked them to discuss beauty in their culture:

Holly Fulger and Emmaly Manchanthasouk enjoy following the latest trends in makeup and fashion but feel doing so undermines the way people see them. "I want to be able to be a woman and be perceived as powerful and sexy," Fulger said.

Jessica Keown and Amy Cunningham have traveled the world and learned quickly that beauty means something different in every place they visit.

Monika Settergren and Shala Crawford both suffered because they didn't have what society told them was the ideal body type as teenagers. "I don't always wake up feeling pretty, and I have to tell myself that I am," Crawford shared.

Saddaf Hasseeb and Nyasha Chikwekwete bonded over their families' cultural definitions of beauty. Hasseeb's family is from Afghanistan and her darker skin wasn't considered beautiful until she moved to California. Chikwekwete was considered too thin in her native Zimbabwe, but in America she's just right.

And Taeun Satya Lee and Rummel Pinera discussed the beauty of the soul and how what's on the inside is more important than anything on the outside. "The whole iReport experience was mesmerizing and highly rewarding," Satya Lee wrote CNN in an e-mail after his discussion with Pinera. "My hope is our message will resonate with sonorous beauty of the truest kind."

The conversations were indeed thought-provoking and enlightening. They showed that in every country, in every city, to every person, beauty means something different. And that's OK by us.

More than ten thousand eggs were dropped from a helicopter, an Amish farmer’s market prepared for a feast, and a city’s streets were decorated with flowers.

Yes, it sounds like Easter.

Regardless of whether people fast, pray or repent during the 40 days of Lent, Easter is celebrated with grandeur, without compromise, by thousands across the globe.

While Easter, a day renowned for colorful eggs, treasure hunts and chocolate bunnies, is a Christian holiday, it is celebrated in many different ways by both Christians and non-Christians alike.

iReporter Joel Graham, shot this picture of the Easter Parade on New York City’s 5^th Avenue. Graham says people posed in their colorful costumes, the mood was festive and the weather was perfect.

Rachel Cauvin, a regular attendee of the New York City parade, describes the event as more of a stroll where people show off their fashionable attire. Women wearing extravagant hats bring back what the parade used to be all about.

Easter is incomplete without a dose of colorful eggs. Inga Lukaviciute, of Washington, D.C., was inspired by a Lithuanian tradition to create these decorated eggs. She first used melted wax to make designs on the eggs and then dyed them in different colors – similar to the process of making a traditional Indonesian material called Batik.

And, an exclusive with a real-life Easter Bunny is the cherry on top of the cake. iReporter Mike Stouffer’s 9-year-old granddaughter, Cinneidi, was able to interview Trista Dolphin about her charity, Bunny Hop. Bunny Hop has been providing children in hospitals and shelters with Easter baskets filled with toys, candies and goodies for four years. This year, Dolphin’s goal is to make 600 baskets.

If you celebrated Easter, we hope you enjoyed a wonderful holiday. Thanks to everyone who shared their photos, videos and stories from their celebrations!

Today is World Autism Awareness Day, and we’re asking people with autism and their loved ones to tell the world what it’s like.

We’ve gotten dozens of moving and personal stories from children and adults on the autism spectrum -- as well as their siblings and parents. Some families have seen their loved ones overcome the odds to great success, while others worry about what the future holds and say there's nothing positive about the diagnosis.

Cheri A. Smith’s 7-year-old son, Bobby, loves to jump, swim, play in the dirt and line up blocks. But, he “cannot tell us if something hurts, why he is upset or happy, where he would like to go, what happened at school today, what he would like to do for his birthday, what he would like Santa to bring him for Christmas or just basic things that we all take for granted.”

As a toddler, Anthony lost all his speech and regressed into autism "almost overnight," says mom Denna Rivera. "We were unable to hug or caress him in any way without him screaming like it hurt." But he has progressed “into a sweet 13-year-old with a zest for learning.”

Karen Michaela Willis, 20, was diagnosed with Asperger's Syndrome when she was 4 years old. She represented Alabama in the 2010 Special Olympics USA National Games in Lincoln, Nebraska, in swimming. She is also looking for employment. "I know that my future is bright even though I'll still have challenges to face, but it's not going to stop me from living my life."

Multi-platinum record producer Michael Buckholtz was 43 when he was diagnosed with Asperger’s Syndrome. He went on to start the Aid for Autistic Children Foundation, to reduce the financial burden for families and caretakers. He was also homeless for a time.

“We, autistic adults, are invisible to many, unless we're savant or become billionaires because of inventing some cutting edge technology or science. We come in all flavors and levels of intellect,” he said. “We desire the same opportunity, as anyone: the pursuit of happiness and stable employment.”

You can see all the stories that have come in here and if you are affected by autism, we hope you will share your perspective with the world.

This week, the U.S. Supreme Court took up the debate over the constitutionality of the Affordable Care Act [ACA], the national health insurance coverage scheme dubbed "Obamacare" that was passed into law in 2010 by a slim margin, and only after much controversy and partisan debate. The nine Justices are debating different aspects of the law, and their verdict will ultimately decide whether or not one of Obama's signature legislative achievements will survive his presidency.

Both supporters and opponents of the law descended on Washington, D.C., this week to attend the various rallies taking place over the ACA. Conservative advocacy group Americans for Prosperity held a "Hands off My Healthcare" rally to drum up the Tea Party opposition; Obama supporters staged their own rally touting the benefits of the ACA in coverage of women's healthcare.

Naturally, iReporters were there as it all went down, and captured some great photographs and on-the-ground flavor of the dueling protests.

Conservative firebrands Rep. Michele Bachmann and Sen. Rand Paul were on-hand at the Americans for Prosperity rally across the street from the Senate yesterday. Photographer Michael Kandel said that their speechifying delivered plenty of the usual red meat and "Republican talking points about health care that we've all heard before." He also notes that Bachmann and Paul "made sure to mention that Obama was out of the country on the second anniversary of the ACA."

Armando Gallardo had a prime view of the dueling camps when they staged simultaneous protests on the steps of the Supreme Court yesterday. He estimates that around 150 people showed up in total, and that the pro-ACA protesters had a slight numerical edge over their conservative counterparts.

Despite the charged nature of the debate, Gallardo said there was plenty of good will to go around. "It really surprised me how respectful both camps were of each other, no one was nasty or called each other names, it was surprisingly positive," he said.

iReporter Felix Masi has a personal stake in the ongoing debate over health care in the U.S., which is why he showed up to document the protest at the Supreme Court yesterday: "We have a 13-year-old with sickle cell," he said. If the Supreme Court renders a verdict that strikes down the ACA, his child may no longer be covered by insurance.

"You come to Uncle Sam, who has over 40 million people without health insurance," he said. "That means if you have over 40 million people without medical cover, it’s like a country without security. To me, strong security for a country is to make sure the people are not hopeless. People have a solid ground in that if they are sick, they’re not just going to die on the streets."

While these protesters were out hitting the pavement, there was plenty more debate in the digital trenches of CNN's comments section, and right here on iReport.

Did you attend any of the pro- or anti-ACA protests this week? Or do you have an opinion on healthcare that you're burning to share with the world? Now's the time to get in on the debate.

Picture this: a clear blue sky, a crystal lake and awe-inspiring monuments lined with pink and white bundles of blooms. Washington’s cherry blossoms are here, and they’re welcoming spring.

The National Cherry Blossom Festival is held every year in Washington, D.C., to showcase the blooming of 3,000 cherry blossom trees that were presented to our nation’s capital by Tokyo, Japan. It also salutes the arrival of spring.

This year, the festival is extra special: It’s the five-week centennial celebration of the trees – and it’s here a few weeks early.  The blossoms, which are typically at their peak bloom around the first week of April, have already begun to flourish due to unusually warm temperatures this winter season. But no one is complaining.

iReporter Ian Dixon, of Arlington, Virginia, headed to the Tidal Basin early Sunday morning to see the first bloom in what he thought was perfect photography weather. “I was really pleased with how this particular shot turned out,” he said.

Capturing the cherry blossoms in front of an iconic backdrop of the city is not uncommon this time of year. Chris Rafford, of Frederick, Maryland, says he wanted to show two symbols of D.C. in one picture. He shot this picture outside the Washington Monument on Sunday evening with his wife and daughters.

Inga Lukaviciute, a Washington, D.C. resident, was also mesmerized by the early blooms. “I didn’t want to miss them, so I wanted to take these photos before they disappear,” she said.

If you’re at the Cherry Blossom Festival this year or are simply appreciating the signs of spring, share your best photos and videos with us!

Florida teen Trayvon Martin was shot by George Zimmerman, an armed community watch officer, in an Orlando suburb last month. The killing sparked an intense debate over whether racism was a motivation in the shooting.

Last night, demonstrators undertook a "Million Hoodie March" in New York City, calling for formal charges to be filed against Zimmerman. iReporters were on the scene filing photos and videos of the rally, and several sounded off on the topic with passionate commentary.

Robert Espier has made a name for himself on iReport photographing various Occupy events in New York City, so the convergence of an Occupy rally in Union Square with the Million Hoodie March afforded him the opportunity to catch these two groups of activists joining forces. He witnessed Martin's parents and several New York City councilmembers giving impassioned speeches on the shooting. "One of the council members said 'We aren't asking for different rights, we are asking for the very same rights as everyone else,'" he said.

Longtime iReporter Omekongo Dibinga believes that Zimmerman now has a responsibility to turn himself in to the police. “If he feels his good name is being tarnished, he should come forward now. I think that would make the most sense if he truly believes he’s innocent,” he said. “The longer he stays quiet, the situation can only get worse, for his situation and his safety.”

Filmmaker Rene Carson was documenting the Occupy rally in Union Park when he saw the marchers for Trayvon Martin join forces with the Occupiers. Intrigued by this development, he started snapping more photos as the protesters spilled into the nearby streets, blocking traffic.

“Overall, it was a very positive and peaceful experience,” he said. “There was lots of confusion because many of the people who came to the march didn't know the full details of the shooting, but people started coming up to the protesters and talking to them, and then more people started joining in the march.”

What's your take on the shooting of Trayvon Martin, and the intense debate that has ensued? Share your opinion with iReport.

Shiny food trucks. A spontaneous dance party. Streets filled with revelers. A lone bike on a rainy sidewalk.

These were just some of the sights that iReporters captured last week during South by Southwest in Austin, Texas. The film, interactive and music conference – known as SXSW – came to a close yesterday.

During the conference, we showcased iReporters’ best SXSW photos in a pop-up gallery at the Austin Convention Center. The display changed daily with the latest photos we received. Visitors to the gallery also had the opportunity to upload their favorite Austin photo to iReport and print it as a postcard.

Photographer Chris Suspect of Hyattsville, Maryland, had a starring role in Monday’s gallery, with his artful photo of a woman standing at a crosswalk. He also earned a spot in Thursday’s selection of photos with a snapshot from an impromptu photo shoot.

Mary Ling of Shanghai, China, happened upon an Angry Birds flash mob and snapped this colorful photo, which we showcased in our gallery on Wednesday.

And Jeremiah Mayhew of Sacramento, California, also appeared twice in the gallery – with his insider view of Google’s Android House, part of the popular "Google Village" erected for South by Southwest Interactive, and photo of a man and his dog roaming the streets at night.

Mayhew had never been to the conference before, and hoped to capture that with his photography. “The images were taken in the mind state that I am creating a memory,” he explained. “I keep doubting that this is all happening. My eyes have truly been opened throughout this SXSW experience and my heart is more inspired than ever.”

Thank you to all of the photographers who shared their fantastic SXSW photos with iReport. You can explore them all here.

As clocks struck 2:46 p.m., yesterday, people across Japan shared a moment of silence to remember massive 9.0 earthquake that rattled the country one year ago on March 11, 2011. From somber memorials to messages of hope, iReporters captured the array of emotions marking the anniversary.

Nearly 16,000 people died and 3,000 others remain missing after the earthquake and tsunami. Thousands streamed into Hibiya Park in Tokyo, Japan, many of them crying silently during a memorial. iReporter Cristian Williams said he felt a "mutual feeling of respect" throughout the crowd, between those who were affected by the disaster and those who wanted to offer their support.

"Towards the end, after 2:46, it seemed to take a turn towards optimism," Williams said. "Many talked about how recovering made Japan and its people much stronger. No one would forget 3-11-11, but everyone won't dwell on it. Japan will recover and continue to strive."

Elsewhere in Tokyo, it appeared a normal day -- reflecting how life has moved on from tragedy -- as shoppers walked through the upscale shopping district of Ginza.

"A year has passed with much, pain, shock and silence,"  said iReporter Allan Cook, who was commuting to his job as an English teacher in central Tokyo when the earthquake hit. "I think now we really need to celebrate the lives of those that died. And we need to bring back the happiness to those that survived and are suffering."

And across the Pacific, earthquake survivor Ayack Alberto Montalvan Aleman spoke about his experience at a candlelight ceremony in Managua, Nicaragua. The event was organized by students that studied in Japan.

"We wanted to organize this in order for us as Nicaraguans to say, 'We are here, and we are supporting you Japan,'" he said.

Dozens of iReporters who witnessed the earthquake and tsunami gave us updates on how their lives have changed over the past year. From uncertainty to courage, distrust to control, and despair to hope, we told the stories of five of these iReporters in a story that ran on CNN.com yesterday.

Thank you for sharing your powerful stories. And, in the words of the Japanese posters that have cropped up all over the country: "Japan, Rising Again. Thank you for your support."

Over the past week, iReporters have helped CNN viewers put a human face on the storms and tornadoes ravaging the South and Midwest United States.

A lot of people were still asleep on Wednesday when a tornado hit Harrisburg, Illinois, but nurse practitioner Jane Harper was working at Harrisburg Medical Center and snapped images of the destruction. She described the chaotic scene with CNN's Suzanne Malveaux and again with CNN's Brooke Baldwin.

"Sometimes we get desensitized after looking at home after home that was destroyed," says CNN meteorologist Jacqui Jeras, who frequently highlights iReports on TV.  "When you hear from iReporters, when you hear the frightening experience they're going through, it really makes put it into perspective for our viewers that this affected people’s lives."

When a series of twisters hit Henryville, Indiana, on Friday, CNN crews headed to the scene to report on the damage. But one of the most powerful pieces of footage came from iReporter Chad Hinton, who was driving on Indiana when he spotted "a huge tornado in the sky." CNN's Josh Levs, who was on the air covering images sent into CNN including iReports, featured Hinton's video on TV Saturday, along with Virginia Military Institute student Ted Gottwald's iReport footage of massive hail in Chattanooga, Tennessee.

"We were showing all this devastation in Henryville, but what this iReporter had captured was video of the tornado. He was looking at it," Levs says. "That piece of footage put in context all the devastation that we saw in Henryville."

Powerful footage also came in from Kevin Welz, who captured the tornado dropping down in Henryville, Indiana. He spoke live with Don Lemon Saturday night.

"It was ... a wrong place at the right time type of situation," Welz says. "I should have been looking for cover but by the time that thought entered my head it was almost over."

Levs and Jeras want to remind iReporters that getting video should never come before their safety. "Don't go into danger to take any videos," Levs says. "I won’t show it if I have the sense that that person went into danger."

While there were many memorable moments during last night’s Academy Awards ceremony, some iReporters had their own memorable moments before the show even began.

After years of applying, Julie Ellerton was finally granted the opportunity to cover the preparations for the awards, which took place all last week.

“I found it to be an extraordinary experience to cover an event with journalists from around the world,” she said. “I met journalists from Germany, France, Spain, all preparing to interview the celebrities on the red carpet.”

We also received plenty of picks and predictions in the lead up to the awards. A poetic prediction which included all of the Best Picture nominees, from San Diego’s Chris Soriano, really caught the eye of “Showbiz Tonight’s” producers:

“The Artist” would go on to win Best Picture, dashing Soriano’s forecast, but his wasn’t the only prediction to falter. Melissa Fazli told us that the only one she picked correctly was Best Director winner, Michel Hazanavicius. This hasn’t put a dent on her spirits, however. In fact, she already has predictions for next year.

It would not be an Oscars without some measure of controversy. After the awards, Omekongo Dibinga got to thinking about what he perceives as a lack of recognition for black actors in Hollywood: “You can't even find black women in leading roles. If it wasn't for Tyler Perry you wouldn't see many black women on the big screen. It's sad.”

Share your view on the winners, the losers, and the state of Hollywood in general in our “Showbiz Tonight” assignment.