particularly at Los Alamos where many scientists and technicians were eager to return to civilian pursuits. The solutions to the challenges led directly to the transformation of Albuquerque's old Oxnard Field into the nation's principal nuclear weapons installation.

Atomic Bomb engineering was carried out by the Z Division, named for its director, Dr. Jerrold R. Zacharias from Los Alamos. Z Division was conceived as an ordnance design, testing, and assembly arm. However, space was at a premium at