The Mercury 7 in 1961 here during training for Project Mercury. ( Chosen from among hundreds of applicants, the seven men were all test pilots. Standing in front of the U.S. Air Force Convair F-106B aircraft, the astronauts are, from left, Lt. M. Scott Carpenter, Capt. Gordon Cooper, Col. John H. Glenn Jr., Capt. Virgil "Gus" Grissom, Lt. Comdr. Walter Schirra, Lt. Comdr. Alan B. Shepard Jr. and Capt. Donald K. "Deke" Slayton.