Charles Darwin and Abe Lincoln share a birthday, Superman makes his radio debut, President Clinton is acquitted in his impeachment trial, and Charles Schulz passes away, all on this day.
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U.S. Air Force
1973: The first release of American prisoners of war from Vietnam takes place as part of Operation Homecoming. From Feb. 12 to April 4, there were 54 missions flying out of Hanoi, bringing the former POWs home.