NASA launched its Mariner 7 space probe from Cape Canaveral atop an Atlas-Centaur rocket.
The Mariner 7 probe was launched 31 days after its identical counterpart, Mariner 6. The two probes conducted the first dual fly-by of Mars, with Mariner 7 reaching Mars just five days after Mariner 6 despite launching a month later. Mariner 7 took 23 near and 93 far encounter images of Mars, with the pair transmitting 100MB of data back to Earth.