John GlennAstronaut John Glenn Jr. is honored by President John F. Kennedy after Glenn's historical first manned orbital flight, Mercury-Atlas 6....Astronaut John H. Glenn Jr. (left), Dr. William Douglas, astronauts flight surgeon, and equipment specialist Joe Schmitt leave crew quarters...Project Mercury Astronaut John H. Glenn Jr., prime pilot for the MA-6 mission, takes a work-out in the procedures trainer...Prime astronaut John Glenn and backup pilot Scott Carpenter check over notes after a simulated flight prior to the Mercury-Atlas...Following ceremonies at Cape Canaveral Air Force Station's Hangar S on Feb. 23, 1962, astronaut John Glenn, left, describes his...