The S-II is the second stage of NASA's Apollo moon-landing rocket - the giant Saturn V. The most powerful hydrogen-fueled booster under production, the S-II is destined for Apollo manned lunar missions and will help power three Americans to the moon. The S-II is being developed and manufactured at Seal Beach, Calif., by North American's Space and Information Systems Division, Downey, Calif., under the technical direction of NASA's Marshall Space Flight Center, Huntsville, Ala.
