In attempting to reach the moon, NASA turned from the undersized Mercury spacecraft to the larger Gemini capsule. Twelve feet in length, the newer model consisted of a re-entry module containing two crew members, an equipment module, and the retrograde section, retaining Mercury's familiar cone shape. The 10 manned missions in 1965-1966 achieved the abilities of orbital maneuvering, rendezvous and docking, and extravehicular activity, or spacewalking. Credit: NASA.