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 confrontation, during which Sibrel followed Aldrin despite being told to leave him alone, and called him "thief, liar and coward", the 72-year-old Aldrin punched Sibrel in the jaw, which was caught on camera by Sibrel's film crew. Aldrin stated that he had acted to defend himself and his stepdaughter. Witnesses stated that Sibrel had aggressively poked Aldrin with a Bible. Additional mitigating factors were that Sibrel sustained no visible injury and did not seek medical attention, and that Aldrin had no criminal record; the police declined to press charges against Aldrin. In 2005, while being interviewed for a documentary titled