S69-40945 (August 1969) --- This is a core tube sample under study and examination in the Manned Spacecraft Center?s (MSC) Lunar Receiving Laboratory (LRL). The sample was among lunar soil and rock samples collected by astronauts Neil A. Armstrong and Edwin E. Aldrin Jr. during their extravehicular activity (EVA) on July 20, 1969. While astronauts Armstrong, commander; and Aldrin, lunar module pilot; descended in the Apollo 11 Lunar Module (LM) "Eagle" to explore the Sea of Tranquility landing site on the moon. Astronaut Michael Collins, command module pilot, remained with the Command and Service Modules (CSM) "Columbia" in lunar orbit.