World's Tallest Building Opens

On Jan. 4, the Burj Khalifa, the new tallest building in the world, opened in downtown Dubai. (credit: Martin Rose/Getty Images)

Earthquake Devastates Haiti

On Jan. 12, a massive 7.0 earthquake struck Haiti, destroying the capitol city of Port-au-Prince and killing 300,000 people. (credit: Frederic Dupoux/Getty Images)

John and Elizabeth Edwards Separate

On Jan. 21, former vice-presidential candidate John Edwards and his wife, Elizabeth, filed for separation. The former North Carolina senator had fathered a child through an extramarital affair with campaign worker Rielle Hunter. (credit: Amy Sussman/Getty Images)

The iPad Debuts

On Jan. 27, Steve Jobs unveiled the iPad, Apple's first tablet device. (credit: Justin Sullivan/Getty Images)

Toyota Troubles

(credit: by Joe Raedle/Getty Images)

IRS Building In Austin Attacked

On Feb. 18, a suicidal man crashed his small plane into the IRS building in Austin, Texas. (credit: Ben Sklar/Getty Images)

Tiger Woods Apologizes

On Feb. 19, Tiger Woods offered an apology for disappointing his fans and wife after numerous women went public claiming they had affairs with the superstar. (credit: Lori Moffett-Pool/Getty Images)

Killer Whale Kills SeaWorld Trainer

On Feb. 24, Sea World trainer Dawn Brancheau was killed by Tilikum, a killer whale who grabbed her pony tail. (AP Photo/Orlando Sentinel, Julie Fletcher, File)

8.8-Magnitude Quake Hits Chile

On Feb. 27, a devastating 8.8-magnitude quake hit Chile, killing 497 people. (credit: Joe Raedle/Getty Images)

Body Scanners Land At O'Hare

On Mar. 15, full body scanners began being used at Chicago's O'Hare airport. The scanners set off a debate about privacy and security. (credit: Scott Olson/Getty Images)

Obama Signs Health Care Reform Bill

On Mar. 23, President Barack Obama signed his signature health care reform bill into law after a year-long, bitter, partisan debate. (credit: Chip Somodevilla/Getty Images)

S. Korean Ship Cheonan Sinks

On Mar. 23, a South Korean military vessel after an explosion. Evidence pointed to a North Korean attack on the vessel. (Photo by Chung Sung-Jun/Getty Images)

2010 Census Begins

On Apr. 1, the U.S. government began conducting the census. (credit: Chip Comodevilla/Getty Images)

Iceland Volcano Eruption

On Apr. 14, the Eyjafjallajökull volcano in Iceland began erupting. The plume of ash caused severe disruption in flights to and from Europe. (AP Photo/ Jon Pall Vilhelmsson, File)

Deepwater Horizon Explodes

On Apr. 20, BP's Deepwater Horizon offshore drilling rig exploded, causing massive environmental damage. Oil would spill into the gulf for months. (credit: Win McNamee/Getty Images)

Arizona's Controversial Immigration Law

On Apr. 23, Arizona Governor Jan Brewer signd a controversial bill empowering law enforcement to stop people suspected of being illegal aliens. (credit: John Moore/Getty Images)

Times Square Bombing Attempt

On May 1, radicalized American citizen Faisal Shahzad attempted to blow up a car bomb in New York City's Times Square. (Photo by Chip Somodevilla/Getty Images)

Joran van der Sloot Arrested

On June 3, Joran van der Sloot was arrested in Peru, accused of killing Stephany Flores Ramírez. Van der Sloot was long suspected of killing Natalee Holloway. (AP Photo/Aliosha Marquez, File)

Gen. McChrystal Resigns

On June 23, Gen. Stanley McChrystal, commander of U.S. troops in Afghanistan, resigned after his disparaging remarks about Vice President Biden and other administration officials appeared in Rolling Stone magazine. (credit: Brendan Smialowski/Getty Images)

Russian Spy Ring Broken Up

On June 27, Anna Chapman was one of 11 people in the U.S. and Cyprus arrested and accused of being a 'sleeper agent' for Russia. The spies were later swapped with Russia. Credit: AP Photo

Barefoot Bandit' Busted

On July 11, Colton Harris-Moore, the so-called 'Barefoot Bandit,' was arrested after crashing a stolen private plane in the Bahamas. Harris-Moore had become an internet sensation after his alleged theft spree. (credit: AP)

Obama Signs Financial Reform Bill

On July 21, President Barack Obama signed a law intended to prevent another massive meltdown of the financial system. (credit: Chip Somodevilla/Getty Images)

Wikileaks Discloses Afghanistan Cables

On July 25, the website Wikileaks released 90,000 U.S. diplomatic reports about Afghanistan, alleging massive corruption. (credit: Peter Macdiarmid/Getty Images)

Chelsea Clinton Marries

On July 31, Chelsea Clinton married Marc Mezvinsky. (credit: Barbara Kinney via Getty Images)

Prop 8 Struck Down

On Aug. 4, a California judge struck down Proposition 8, which barred same-sex couples from marrying. (credit: Justin Sullivan/Getty Images)

Elena Kagan Sworn In

On Aug. 7, Elena Kagan was sworn in as the 112th justice of the U.S. Supreme Court. She's the court's 4th female justice. (credit: J. Scott Applewhite-Pool/Getty Images)

Ted Stevens Killed

On Aug. 9, former Alaska Senator Ted Stevens was killed in a small plane crash. (credit: Win McNamee/Getty Images)

Flight Attendant's Dramatic Exit

On Aug. 9, JetBlue flight attendant Steven Slater created a sensation after an incident with a passenger prompted him to quit on the spot. He grabbed some beer and left the plane via the emergency exit slide. (AP Photo/Louis Lanzano, file)

Obama Sounds Off On 'Ground Zero' Mosque

President Obama weighed in on the debate on plans to build an Islamic community center near New York City's Ground Zero. The president noted on Aug. 13, 2010, the Constutional right for the mosque and community center to be built in that location. (Photo by Spencer Platt/Getty Images)

Hundreds Of Millions Of Eggs Recalled

One of the nation's largest egg distributor, Wright County Egg in Iowa, announced on Aug. 13, 2010, a recall of 380 million eggs linked to an outbreak of salmonella poisoning. (credit: Alex Wong/Getty Images)

Alleged 'Craigslist Killer' Commits Suicide

Accused "Craigslist killer" Philip Markoff killed himself on Aug. 15, 2010, in jail. Officials discovered his body with a plastic bag tied over his head. He was awaiting trial in the murder case of Julissa Brisman, a 25-year-old New Yorker. (credit: Mark Garfinkel-Pool/Getty Images)

Bedbugs Make Way Across The Nation

Pest control company Terminix revealed on Aug. 25, 2010, a list of the 15 most bedbug-infested cities in the United States. Topping the list were New York City, Philadelphia, and Detroit. (credit: Brian Kersey/Getty Images)

Glenn Beck Hosts Rally To 'Restore Honor'

Conservative Fox News commentator Glenn Beck and Sarah Palin hosted on Aug. 28, 2010, a "Restoring Honor" rally on the National Mall in Washington, D.C. (Photo by Alex Wong/Getty Images)

Obama Declares End To Combat Missions In Iraq

In his second nationally-televised Oval Office address on Aug. 31, 2010, President Obama lauded the end of "Operation Iraqi Freedom," more than seven years after the war was launched by previous President George W. Bush. (credit: Brendan Smialowski-Pool/Getty Images)

The End Of An Era

Mayor Richard Daley addresses the National Fraternal Congress Septemeber 9, 2010 in Chicago, Illinois. Daley announced September 8, that he would not seek reelection as mayor, a post he has held since 1989. (credit: John Gress/Getty Images)

Florida Pastor Calls Of Quran-Burning

The Rev. Terry Jones announced on Sept. 9, 2010, that he no longer plans to burn copies of the Quran on the 9th anniversary of the Sept. 11, 2001, terror attacks. The Florida pastor said he changed mind after meeting with a New York imam. (credit: Joe Raedle/Getty Images)

Gas Explosion Devastates California City

At least four people were killed and dozens more hospitalized when a gas line exploded on Sept. 9, 2010, in San Bruno, Calif. The explosion resulted in a massive fire in a residential community near San Francisco's International Airport. (credit: Justin Sullivan/Getty Images)

Iran Releases American Sarah Shourd

Iran released American hiker Sarah Shourd on Sept. 14, 2010, after keeping her detained in prison for 14 months. Her fiance Shane Bauer and friend Josh Fattal remain imprisoned in Iran. (credit: Stringer/Getty Images)

Repeal Of Military Ban On Gays Blocked

The effort to lift the military's ban on gays serving openly in failed when the Senate voted down on Sept. 21, 2010, a defense bill that includes the conditional repeal of Don't Ask, Don't Tell. (credit: Alex Wong/Getty Images)

Facebook Founder Donates $100M To Schools

Facebook founder and CEO Mark Zuckerberg revealed on Sept. 22, 2010, on "The Oprah Winfrey Show" his donation of $100 million to the Newark public school system. (credit: Justin Sullivan/Getty Images)

Students Kills Self After Sex Encounter Broadcast

Rutgers University freshman Tyler Clementi committed suicide on Sept. 22, 2010, after his dorm roommate secretly used a webcam to stream Clementi's homosexual encounter on the Internet. Clementi jumped off the George Washington Bridge. (credit: Personal Photo/CBSnews.com)

Rahm Emanuel Leaves White House Post

White House Chief of Staff Rahm Israel Emanuel resigned on Oct. 1, 2010, from his post, which he held since Jan. 20, 2009. Emanuel leaves to pursue a campaign run for mayor of Chicago. (credit: Alex Wong/Getty Images)

Suspect Convicted In Petit Family Murders

Steven Hayes, one of two men accused in a deadly home invasions and the brutalization and murders of a woman and her daughters, was found guilty Oct. 5, 2010, of 16 of the 17 counts he faced in relation to the case. (AP Photo/Connecticut Department of Correction, File)

Chilean Miners Freed After Months Underground

All 33 miners trapped thousands of miles beneath the earth in Chile were finally rescued on Oct. 13, 2010, after more than two months underground. (credit: Frazer Harrison/Getty Images)

Package Bombs Found On Chicago, U.S. Bound Flights

Two package bombs headed for the United States were intercepted by authorities in Britain and Dubai that were meant to explode in-flight and to bring down the planes carrying them. The flights originated in Yemen. (credit: CBS News)

Stewart, Colbert Host "Rally To Restore Sanity/Fear"

Comedy Central duo, Jon Stewart and Stephen Colbert, hosted the "Rally to Restore Sanity and/or Fear" on Oct. 30, 2010, on the National Mall in Washington, D.C. Around 215,000 people attended the free rally. (credit: Win McNamee/Getty Images)

Republicans Take Back Control Of Congress

Midterm election results indicated on Nov. 2, 2010, that Republicans would win enough seats in the House of Representatives to take control of the chamber. John Boehner, R-Ohio, will be the Speaker of the House. (credit: Win McNamee/Getty Images)

George W. Bush Releases 'Decision Points' Memoir

George W. Bush released his memoirs on Nov. 9, 2010, which covers his life before the presidency, his battle with alcoholism, the Sept. 11, 2001 terror attacks, the wars in Afghanistan and Iraq, and more. He was paid $7m for the first 1.5m copies. (credit: Tom Pennington/Getty Images)

Disabled Cruise Ship Pulled Into San Diego Port

Powerless cruiseship Carnival Splendor was pulled into the Uinfied Port of San Diego in California on Nov. 11, 2010 after a fire left the vessel without electricity. The ship had been drifting about 200 miles of the Mexican coast before returning to land hours later. (credit: Kevork Djansezian/Getty Images)

Four Loko Drops Caffeine From Energy Drink

The manufacturers of a popular caffeinated alcohol drink announced on Nov. 16, 2010, that they will remove the caffeine from its controversial products -- just before the FDA reveals its intention to ban the Four Loko beverage. (credit: Joe Raedle/Getty Images)

North Korean Artillery Fire Kills Soldiers

North Korea fired shells Nov. 23, 2010, at the South Korean island of Yeonpyeong, near a disputed maritime border. South Korean soldiers were killed and civilians injured during the attack, which occurred during the South's military exercises. (credit: Getty Images)

Tom DeLay Convicted Of Money Laundering

Former U.S. House Majority Leader Tom DeLay was convicted Nov. 24, 2010, on charges he illegally gave corporate money to Texas political candidates in 2002. He was potentially facing decades in prison. (credit: Ben Sklar /Getty Images)

Obama Gets Stitches For Busted Lip

President Obama received 12 stitches in his lip on Nov. 26, 2010, after accidentally getting elbowed in the face during a basketball game with family and friends. (credit: Olivier Doulier-Pool/Getty Images)

WikiLeaks Releases 250,000 Diplomatic Cables

Whistleblower website WikiLeaks released on Nov. 28, 2010, cables marked as "classified," "confidential," and "secret" from United States diplomats, revealing embarrassing and potentially politically-damaging information to the whole world. (credit: Oli Scarff/Getty Images)

President Obama, GOP Hold 'Slurpee Summit'

This post-primary election meeting between President Obama and GOP leaders was held Dec. 2, 2010, and dubbed the "Slurpee summit" in relation to Obama's comments about the GOP sitting on the sidelines "sipping Slurpees" during the economic crisis. (credit: Pete Souza/The White House Via Getty Images)

NASA Announces Discovery Of New Life Form

NASA revealed on Dec. 2, 2010, that researchers have found microorganic life on Earth that's able to survive and reproduce using arsenic.NASA says the find will impact the search for evidence of extraterrestrial life. (credit: Mark Wilson/Getty Images)

House Censures Rep. Charles Rangel

New York Democrat, Rep. Charles Rangel was official censured on Dec. 2, 2010, by the House of Representatives after an investigation revealed a series of ethics violations. (credit: Alex Wong/Getty Images)

President Obama Announces Tax Deal

President Obama unveiled a compromise with Republicans to extend Bush-era tax cuts across the board for all Americans, including the wealthiest. Former President Bill Clinton urged reluctant Democrats to support Obama's plan. (credit: Alex Wong/Getty Images)

Elizabeth Edwards Succumbs To Cancer

Elizabeth Edwards, wife of former presidential candidate John Edwards, lost her battle with cancer on Dec. 7, 2010. Edwards was seen as a face of resilience and grace amid her husband's affair with a campaign videographer.(AP Photo/Matt Sayles)

WikiLeaks' Julian Assange Arrested In UK

WikiLeaks chief editor Julian Paul Assange was arrested Dec. 7, 2010, in the United Kingdom on sex-related charges. WikiLeaks, a whistleblower website, has released thousands of unclassified, confidential, and secret cables from United States diplomats. (credit: Thomas Coex/AFP/Getty Images)