S66-42782 (21 July 1966) --- The Gemini-10 spaceflight is concluded as the Gemini-10 spacecraft, with astronaut John W. Young and Michael Collins aboard, touches down in the Atlantic about four miles from the prime recovery ship, the USS Guadalcanal. Gemini-10 splashed down 540 miles east of Cape Kennedy at 4:07 p.m. (EST), July 21, 1966, to conclude a three-day mission in space. Photo credit: NASA