John Glenn was not popular with the other astronauts. Glenn was the backup pilot for Shepard and Grissom on the first two manned Project Mercury flights, the sub-orbital missions Mercury-Redstone 3 and Mercury-Redstone 4. Glenn was selected for Mercury-Atlas 6, NASA's first manned orbital flight, with Carpenter as his backup. Putting a man in orbit would achieve one of Project Mercury's most important goals. Shepard and Grissom had named their spacecraft "Freedom 7" and "Liberty Bell 7". The numeral 7 had originally been the production number of Shepard's spacecraft, but had come to represent the Mercury 7. Glenn named his spacecraft, number
John Glenn became the chair of both subcommittees. One of his goals as a new senator was developing environmental policies. Glenn introduced bills on energy policy to try to counter the energy crisis in the 70s. Glenn also introduced legislation promoting nuclear non-proliferation, and was the chief author of the Nuclear Non-Proliferation Act of 1978, the first of six major pieces of legislation that he produced on the subject. Glenn chaired the Committee on Governmental Affairs from 1987 to 1995. It was in this role that he discovered safety and environmental problems with the nation's nuclear weapons facilities. Glenn was made aware