music: "Leaving On A Jet Plane" was recorded by Peter Paul & Mary, but written by him.?

Questions

Christian Doppler, discovered Doppler Effect (color shift)?

Sir Ambrose Fleming, inventor of the diode?

Colorado militia kills 150 peaceful Cheyenne Indians.?

Antonio Egas Moniz, Portuguese lobotomist (Nobel 1949)?

U.S. receives rights to Pearl Harbor, on Oahu, Hawaii.?