Wikipedia:Selected anniversaries/May 7
May 7: Radio Day in Russia and Bulgaria
- 1763 - Indian Wars: Chief Pontiac led an attempt to seize Fort Detroit and drive out the British settlers, beginning Pontiac's Rebellion.
- 1895 - Alexander Stepanovich Popov (pictured) presented his radio receiver, refined as a lightning detector, to the Russian Physical and Chemical Society.
- 1915 - World War I: The ocean liner RMS Lusitania was torpedoed and sunk by the German submarine Unterseeboot 20, killing 1,198 on board.
- 1992 - The Space Shuttle Endeavour was launched for its maiden voyage.
- 1999 - President of Guinea-Bissau João Bernardo Vieira was ousted in a military coup.