On this day in history
1875: The new French constitution is finalized.
1882: Mary Todd Lincoln, the widow of Abraham Lincoln, dies of a stroke.
1918: Czar Nicholas and his family are murdered by Bolsheviks at Ekaterinburg, Russia.
1940: Adolf Hitler orders preparations for the invasion of England.
1945: The United States detonates the first atomic bomb in a test at Alamogordo, N. M.
1969: Apollo 11 blasts off from Cape Kennedy, Florida, heading for a landing on the moon.
1999: A private plane piloted by John F. Kennedy Jr. is lost over the waters off Martha's Vineyard, Mass.