The appointment of Sonia Sotomayor to the U.S. Supreme Court; the reform of American healthcare from its beginnings in the 20th century to the Affordable Care Act in 2010; Deepwater Horizon Explosion in the Gulf of Mexico - 2011 - U.S. Navy SEALS Take Down Osama Bin Laden- 2012 - Washington and Colorado Legalize Marijuana; 2012 - The new frontier in space, the privatization of space travel.