Apollo 11 the CMP on the Apollo 8 crew, began experiencing trouble with his legs. Doctors diagnosed the problem as a bony growth between his fifth and sixth vertebrae, requiring surgery. Lovell took his place on the Apollo 8 crew, and, when Collins recovered, he joined Armstrong's crew as CMP. In the meantime, Fred Haise filled in as backup LMP, and Aldrin as backup CMP for Apollo 8. Apollo 11 was the second all-veteran crew on an American mission, the first being that of Apollo 10. The next was STS-26 in 1988. The backup crew consisted of Lovell as Commander, William Anders
Apollo 11 smaller Susan B. Anthony dollar unveiled in 1979. After the crew of Apollo 10 named their spacecraft "Charlie Brown" and "Snoopy", assistant manager for public affairs Julian Scheer wrote to George M. Low, the Manager of the Apollo Spacecraft Program Office at the Manned Spacecraft Center (MSC), to suggest the Apollo 11 crew be less flippant in naming their craft. The name "Snowcone" was used for the CM and "Haystack" was used for the LM in both internal and external communications during early mission planning. The LM was named "Eagle" after the motif which was featured prominently on the mission