US had a couple good milestones with the Mariner program. Mariner 2 was the firs...

		WillPostForFood 10 months ago \| parent \| context \| favorite \| on: After 53 years, a failed Soviet Venus spacecraft i... US had a couple good milestones with the Mariner program. Mariner 2 was the first Venus flyby in 1962, and Mariner 4 was the first Mars flyby in 1965.