AILSA CHANG, HOST:
May 3 may not seem like much, but it is the date that this show first hit the airwaves way back in 1971.
AUDIE CORNISH, HOST:
TV news aired on three networks.
CHANG: Milk cost 50 cents a gallon.
CORNISH: Lew Alcindor had just led the Milwaukee Bucks to an NBA title.
CHANG: National Public Radio may not have had many listeners that first broadcast, but those who did tune in tended to stay around for more.