1821:Spain ceded Florida to the United States.
1917:The British royal family changed its name from the House of Saxe-Coburg-Gotha to Windsor amid anti-German senitment during World War I.
1938:"Wrong Way Corrigan" took off from New York, purportedly aiming for California and landing in Ireland.
1945:President Harry Truman, Soviet leader Joseph Stalin and British Prime Minister Winston Churchill meet at the opening of the Potsdam Conference.
1998:The last Russian Czar Nicholas II was buried 80 years after he and his family were executed by the Bolsheviks.