Thomas Edison was granted a patent for his incandescent light.
The Russians liberated the Auschwitz Concentration camp, where Nazis had killed over 1.5 million people, including over 1 million Jews.
The U.S. Air Force started atomic testing in the Nevada desert.
The Apollo 1 fire killed astronauts Grissom, White, and Chaffee during a simulated launch at Cape Canaveral.
Vietnam War peace accords were signed in Paris.