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 Columbus International Airport John Glenn Columbus International Airport John Glenn Columbus International Airport , is an international airport located east of downtown Columbus, Ohio. Formerly known as Port Columbus International Airport, it is managed by the Columbus Regional Airport Authority, which also oversees operations at Rickenbacker International Airport and Bolton Field. The airport code 'CMH' stands for "Columbus Municipal Hangar," the original name for the airport. John Glenn Columbus International Airport is primarily a passenger airport. It provides 140 non-stop flights to 34 airports via 7 airlines daily. In 2016, traffic reached 7.3 million, which was an 8% increase over 2015. Traffic in