The Development Directorate's mission was to study, research, and develop nuclear weapons, weapons systems, components, and associated equipment for the USAF. In the early 1950s, the Development Directorate conducted numerous nuclear weapons studies focusing on specific target effectiveness and detonation conditions of atomic weapons. The Development Directorate was the AFSWC division working in conjunction with LASL and Sandia Laboratory as new bomb designs were developed. In terms of the stockpile-to-target sequence, the Directorate conducted R&D on techniques for suspension and release of the bombs created by Sandia Laboratory, retardation devices and lay-down delivery of the bombs, as well as monitoring their designs for USAF requirements.