November 12-14, 1966: Buzz Aldrin on the Gemini 12

According to NASA historians David S. F. Portree and Robert C. Treviño in Walking to Olympus , NASA was looking for an "unqualified success" in its EVA maneuvers involving a complex spacewalk. To that end, Aldrin spent three days in 1966 making hours-long spacewalks, the longest at 2 hours and 18 minute, during which he installed a series of cameras on the craft. The next day, he completed the first successful complex spacewalk and proved a number of technologies to be used in the Apollo missions.