Astronaut John H. Glenn Jr., wearing a Mercury pressure suit, is photographed at Cape Canaveral, Florida, during preflight training activities for the Mercury-Atlas 6 (MA-6) mission. Glenn made America's first manned Earth-orbital spaceflight on Feb. 20, 1962. Launched from Cape Canaveral (Florida) Launch Complex 14, he completed a successful three-orbit mission around the earth, reaching a max…