The Little Joe 2 was a suborbital test flight of the Mercury space capsule, carrying the rhesus monkey Sam close to the edge of space. He was sent to test the space equipment and the adverse effects of space on humans. December 4, 1959 at 16:20 UTC · Launch Successful Little Joe — National Aeronautics and Space Administration, to Suborbital Launch Area 1, Wallops Flight Facility, Virginia, USA Program: Mercury Data: Launch Library 2, The Space Devs. Image via The Space Devs.