Buzz Aldrin on July 20, Aldrin and Armstrong entered "Eagle", and began the final preparations for lunar descent. At 17:44:00 "Eagle" separated from the "Columbia". Collins, alone aboard "Columbia", inspected "Eagle" as it pirouetted before him to ensure the craft was not damaged, and that the landing gear was correctly deployed. Throughout the descent, Aldrin called out navigation data to Armstrong, who was busy piloting the "Eagle". Five minutes into the descent burn, and above the surface of the Moon, the LM guidance computer (LGC) distracted the crew with the first of several unexpected alarms that indicated that it could not complete
Buzz Aldrin his, and he had trouble keeping up. He then spotted a MiG approaching from above. This time, Aldrin and his opponent spotted each other at about the same. They went through a series of scissor maneuvers, attempting to get behind the other. Aldrin was first to do so, but his gun sight jammed. He then manually sighted his gun and fired. He then had to pull out, as the two aircraft had gotten too low for the dogfight to continue. Aldrin saw the MiG's canopy open and the pilot eject, although Aldrin was uncertain whether there was sufficient time for