NASA launched the Mars Science Laboratory probe, which carried the Curiosity Rover to Mars.
The world's largest Legoland theme park opened in Winter Haven, Florida.
The US military policy 'don't ask, don't tell' came to an end.
Occupy Wall Street movement begins.
NASA's space shuttle program finally came to a close when mission STS-135 landed.
The Space Shuttle Atlantis launched for its final mission.
NASA's Endeavour Space Shuttle landed for its 25th and final time.
NASA launched the Endeavour Space Shuttle on the penultimate space shuttle mission.
The FBI's most wanted man, Osama bin Laden, was killed by the US Navy Seals and CIA operatives in Abbottabad, Pakistan.
An EF4 multiple-vortex tornado destroyed areas of two major Alabama cities: Tuscaloosa and Birmingham.
Space Shuttle Discovery completed its last-ever mission and made its final landing onto Kennedy's runway at 11:57 am EST.
Green River serial killer pleads guilty to 49th murder.
The 'Don't Ask Don't Tell' policy was repealed.
Oil rig Deepwater Horizon is declared sealed after a 5-month long spill in the Gulf of Mexico.
Californian Judge Vaughn Walker overturned the same-sex marriage ban.
Wikileaks published classified information about the war in Afghanistan.
The Deepwater Horizon oil rig explodes.
WikiLeaks published the first US diplomatic cable leak provided by Chelsea Manning.
US President Barack Obama received a vaccine jab against the swine flu.
Major Malik Hasan opened fire at the Soldier Readiness Processing Center in Fort Hood, Texas and killed 13 people, injuring 30.
NASA launched the Lunar Reconnaissance Orbiter, the first American lunar mission in ten years.
Two American journalists were sentenced to 12 years of penal labor after illegally entering North Korea.
NASA's Atlantis Space Shuttle launched on the final mission to service the Hubble Space Telescope.
The strain of swine flu known as H1N1 had its first case in the US.
NASA's Discovery Space Shuttle launched from the Kennedy Space Center on mission STS-119.
Two satellites collide in space.
The USA's first African-American President, Barack Obama, conducted his first address.
US Airways Flight 1549 landed on the Hudson River, NYC.
Billionaire conman Bernard Madoff arrested.
NASA declared the conclusion of the Phoenix mission after contact was lost with the Phoenix lander.
Barack Obama became the first African American to win a United States Presidential Election.
NASA launched its IBEX satellite from the Stargazer mother ship launch pad above the Marshall Islands.
Lehman Brothers file for Chapter 11 bankruptcy protection.
United States Congress apologizes for slavery.
The state of California began issuing marriage licenses to same-sex couples.
The Discovery Space Shuttle was launched from the Kennedy Space Center on mission STS-124.
The California Supreme Court ruled that the state ban on same-sex marriage was unconstitutional.
Space shuttle Endeavour successfully docked with the International Space Station during NASA's STS-123 mission.
The New York Philharmonic Orchestra performed in Pyongyang, North Korea.
Manuel Noriega's sentence in the United States ends.
The EF2 tornado ripped through Brooklyn, New York, for 18 minutes, causing nine injuries and $20 million in damages.
NASA launched the Phoenix spaceship from the Cape Canaveral Air Force Station, Florida, US.
The Mississippi River Bridge collapsed during rush hour.
The US population reached 300 million people.
Naturalists Chris Atkins and Michael Taylor discovered the world's tallest tree in Redwood National Park, California.
Pirates of the Caribbean: Dead Man's Chest premiered at Disneyland Resort, Anaheim, California.
NASA decided to suspend space shuttle flights after analyzing the launch of mission STS-114.
A brand new design for Freedom Tower in Manhattan, New York, was publicly revealed.
Reddit was founded in Medford, Massachusetts.
Deep Throat reveals himself.
