Vanguard 3 is launched from Launch Complex 18 (NASA)
NASA LAUNCHED A THREE-STAGE VANGUARD (SLV-7) FROM CAPE CANAVERAL, FLA. SEPTEMBER 18, 1959. DESIGNATED VANGUARD III, THE 100 POUND SATELLITE WAS USED TO STUDY THE MAGNETIC FIELD AND RADIATION BELT. VANGUARD IS U.S. NAVY PROJECT.