 The manned flight hiatus allowed work to catch up on the Saturn V and Lunar Module, which were encountering their own delays. Apollo 4 flew in November 1967. Apollo 1's (AS-204) Saturn IB rocket was taken down from Launch Complex 34, later reassembled at Launch complex 37B and used to launch Apollo 5, an unmanned Earth orbital test flight of the first Lunar Module LM-1, in January 1968. A second unmanned Saturn V AS-502 flew as Apollo 6 in April 1968, and Grissom's backup crew of Wally Schirra, Don Eisele, and Walter Cunningham, finally flew the orbital test mission as Apollo 7 (AS-205), in a Block II CSM in October 1968.
