Today is the 50th day of the year and there are 315 days remaining.
1807 - In Alabama, former Vice President Aaron Burr is arrested for treason and confined to Fort Stoddert.
1847 - The first group of rescuers reaches the Donner Party.
1859 - Daniel E. Sickles, a New York Congressman, is acquitted of murder on ground of temporary insanity. This is the 1st time the defense is successfully used in the United States.
1878 - Thomas Edison patents his phonograph.
1942 - President Franklin Roosevelt signs the Executive Order 9066, allowing the United States military to relocate Japanese-Americans to internment camps.
1945 - To begin the Battle of Iwo Jima, about 30,000 United States Marines land on the island.
1976 - Executive Order 9066, is rescinded by President Gerald Ford's Proclamation 4417.
1985 - Artificial heart recipient William J. Schroeder becomes the first such patient to leave hopsital.
1986 - The Soviet Union launches its Mir spacecraft. Remaining in orbit for 15 years, it is occupied for 10 of those years.
1999 - President Bill Clinton issues a posthumous pardon for U.S. Army Lt. Henry Ossian Flipper. Flipper was the first African-American to graduate from West Point and prove himself leading Buffalo Soldiers during the Indian Wars, however he was wrongfully court-martialed and dismissed from the Army.
2002 - NASA's Mars Odyssey begins to map the surface of Mars using thermal emission imaging systems.