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
Glenn Rhee Again," Glenn first appears in a flashback. In a flashback Glenn and Nicholas show at the infirmary both bloody and bruised from their fight in the woods. Glenn is patched up by Rosita and Maggie asks him what happened. Glenn tells her that walkers attacked him and Nicholas in the woods and Glenn was accidentally hit by a bullet that ricoched off of a tree and hit him in the shoulder. Glenn later appears at Rick's meeting where they discuss how to get rid of the walker herd in the quarry. Glenn tells Maggie that she should stay in Alexandria