Astronaut John H. Glenn Jr. (left), Dr. William Douglas, astronauts flight surgeon, and equipment specialist Joe Schmitt leave crew quarters prior to Mercury-Atlas 6 (MA-6) mission.
Astronaut John H. Glenn Jr. (left); Dr. William Douglas, astronauts’ flight surgeon; and equipment specialist Joe Schmitt leave crew quarters prior to Mercury-Atlas 6 (MA-6) mission. Glenn is in his pressure suit and is carrying the portable ventilation unit. Photo credit: NASA