The Mercury program represented NASA's first human spaceflight program, with the aim to see if humans could function effectively in space for a few minutes or hours at a time. NASA's first seven astronauts, the Mercury 7, were chosen in 1959.They are: (front, l to r) Walter H. Schirra, Jr., Donald K. Slayton, John H. Glenn, Jr., and Scott Carpenter; (back, l to r) Alan B. Shepard, Jr., Virgil I. Gus Grissom, and L. Gordon Cooper. Vintage photo in very good condition in black and white measuring: 4” x 5”