On this day in 1964, a jury in Dallas found Jack Ruby guilty of killing Lee Harvey Oswald, the assumed assassin of John F. Kennedy.
On this day in 1978, the Israel Defense Forces invaded and occupied southern Lebanon, in Operation Litani.
On this day in 1995, astronaut Norman Thagard became the first American astronaut to ride to space on board a Russian launch vehicle.
On this day in 2007, the first World Maths Day was celebrated.