Top 10 Events in US History

Top 10 events in US History
http://listverse.com/2011/07/14/top-10-important-events-in-us-history/
 * Assassination of Abraham Lincoln
 * Louisiana Purchase
 * Manhattan Project
 * Vietnam War
 * Death of Osama Bin Laden
 * Assassination of JFK
 * The American Revolution
 * The Civil War
 * September 11, 2001
 * Apollo 11