RT @airandspace: TDIH 1967: NASA launched Mariner 5 spacecraft to fly by Venus. Spacecraft was re-purposed backup of Mariner 4 (Mars): ow.ly/Oi0Sh
RT @airandspace: TDIH 1967: NASA launched Mariner 5 spacecraft to fly by Venus. Spacecraft was re-purposed backup of Mariner 4 (Mars): ow.ly/Oi0Sh