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 S. McCain Jr. en route from Europe on March 22, 1981, with his wife at his side. He was buried at Arlington National Cemetery on March 27, 1981. was named for both Admirals McCain. McCain was written about extensively in his son John's 1999 memoir "Faith of My Fathers". McCain was portrayed by actor Scott Glenn in the 2005 television movie adaptation. Grandson John S. "Jack" McCain IV attended and graduated from the United States Naval Academy in 2009, the fourth-generation John S. McCain to do so, and also became a Naval Aviator like his father and great-grandfather. John S. McCain Jr. received