A magnitude 7 earthquake struck Port-au-Prince, the capital of Haiti, and destroyed the city. A worldwide relief effort to help the newly homeless people of Haiti began. Learn more .
The Saints beat the Colts to win their first Super Bowl ever. This triumphant win raised the spirits of New Orleans. Hurricane Katrina had pummeled the city five years before. Learn more .
After months of arguments in Congress, President Obama's health care plan was officially approved. The plan aimed to provide health insurance for 31 million previously uninsured Americans. Learn more .
President Obama created a $3.8 trillion budget for the country. It aimed to improve the economy and help control the deficit. Learn more .
Arizona unveiled a new law that aimed to aggressively find and deport illegal immigrants. The law, which allowed police officers to search any person they believed to be an illegal immigrant, created controversy between pro- and anti-immigration people. Learn more .
Vancouver, a Canadian city, hosted the 2010 Winter Olympics. Americans watched as favorite Lindsey Vonn competed for skiing gold, a task made even harder by poor snow conditions in the mountains. Learn more .
President Obama appointed Elena Kagan to the Supreme Court of the United States. She is the fourth woman to serve as a Supreme Court justice. Learn more .
A volcano erupted in Iceland, and an enormous migrating cloud of ash caused flights to be canceled for days. Learn more .
An oil rig explosion in the Gulf of Mexico not only killed 11 people and disrupted the ecosystem, but also caused an oil spill that took months of international effort to clean up. It was the largest oil spill off the coast of the United States in history. Learn more .
Police found a car bomb in Times Square, the famously busy and bright area of New York City. Luckily, police found the bomb in time, and it didn't explode. Learn more .
President Obama announced that the United States' seven-year long mission in Iraq would come to an end, and that the troops would begin to return to the U.S. Learn more .
Floods caused by monsoon rain caused the deaths of more than 400 people in Pakistan. The floods also destroyed cities and farmland. Learn more .
Spain beat the Netherlands to win the World Cup of soccer for the first time in the nation's history. Spectators celebrated the win by blowing on vuvuzelas, strange noisemaking instruments. Learn more .
Drug trafficking in Mexico causes extreme violence. Drug cartels use any means necessary to protect their goods, and it often means death for innocents caught in the fray. Learn more .
General Stanley McChrystal was fired from his post as top Afghanistan commander after giving a tell-all interview to Rolling Stone Magazine . In this interview, he insulted the president and his policies. Not such a great idea to insult your boss in a national publication. Learn more .
After a vote to ban gay marriage passed in 2008, a judge overturned the ban in 2010. However, the legal process was far from over, and gay marriage was not immediately legal. Learn more .
When France announced that it would raise the retirement age from 60 to 62, nearly a million people marched to protest. Learn more .
After two years of controlling the House of Representatives, Senate and presidency, Democrats lost many positions to the Republicans in the midterm elections. Republicans took control of the House of Representatives, bolstered by the Tea Party, a new ultraconservative political group. Learn more .
Australian Julian Assange posted classified American documents on his website WikiLeaks, revealing many U.S. military and diplomacy secrets. He was arrested. Learn more .
Thirty-three miners in Chile were all saved after being trapped underground for over two months. The world celebrated. Learn more .