Rocket Men: The Daring Odyssey of Apollo 8 and the Astronauts Who Made Man's First Journey to the Moon

by Robert Kurson

The next day, Jerry Lederer, director of NASA’s Office of Manned Space Flight Safety, spoke to a group of aviation enthusiasts in New York. Apollo 8, he said, had one safety advantage over the voyage undertaken by Christopher Columbus in 1492: “Columbus did not know where he was going, how far it was, nor where he had been after his return. With Apollo, there is no such lack of information.” There was, however, the matter of complexity. “Apollo 8 has 5,600,000 parts and 1,500,000 systems, subsystems and assemblies,” Lederer noted. “Even if all functioned with 99.9 percent reliability, we could expect 5,600 defects.” For that reason, Lederer concluded, Apollo 8’s mission would involve “risks of great magnitude and probably risks that have not been foreseen.”