The Apollo 11 crew conducting a crew compartment fit and functional check, of the equipment and storage locations, in their command module.  
Peering from the hatch are from left, Neil Armstrong, commander; Michael Collins, command module pilot; and Buzz Aldrin, lunar module pilot. Armstrong and Aldrin later conducted a similar check aboard the lunar module, which carried them down to the lunar surface on July 20, 1969.
NASA
1969-06-10
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