Astronauts seated inside Gemini 4 Poster

The Gemini-Titan 4 prime crew, astronauts Edward H. White II (left), pilot, and James A. McDivitt, command pilot, check out the Gemini-4 spacecraft during a wet mock simulation test at Cape Kennedy. Gemini 4 was the second crewed mission of the Gemini series and carried James McDivitt and Edward White on a 4-day, 62-orbit, 98-hr flight from June 3 to June 7, 1965. The mission included the first American spacewalk. The objective of the mission was to test the performance of the astronauts and capsule and to evaluate work procedures, schedules, and flight planning for an extended length of time in space. Secondary objectives included demonstration of extravehicular activity in space, conduct stationkeeping and rendezvous manoeuvres, evaluate spacecraft systems, demonstrate the capability to make significant in-plane and out-of-plane manoeuvres and use of the manoeuvring system as a backup reentry system, and conduct 11 experiments.