kiloton The accepted ene: .y equivalent for 1,000 tons of TNT(trinitrotoluene), A nominal atomic bomb, similar to those dropped over Hiroshima and Nagasaki, has a TNT equivalent of 20 kilotons, or 20,000 tons. DELETED you Manhattan Pro ject The sum total of all activity which resulted mark-mod-alt An abbreviation for mark-modificatim- in successful development of the Atomic Bomb, alteration, the basic system of the Atomic Snergy Commission for nomenclature of major assemblies of atomic weapons, which indicates the over-all design of a major assembly and changes thereto, marriage program The development effort conducted for the purpose of fitting atomic warheads to guided missiles or special weapons to aircraft, megaton The accepted energy equivalent for 1,000,000 Moratorium A temporary ban on nuclear testing which resulted from international negotiations and tons of TNT. which began in the United States on 31 Oct. 1958. nuclear- clond The cloud phenomena which results from a a specific nuclear detonation as differentia- ted from atomspheric clouds, Radioactive material which may or may not have resulted from one specific muclear detonation. Early muclear cloud sampling was concerned with the visually recognizable cloud caused by a specific detonation; later world-wide sampling was conducted in specific atmospheric regions without regard to any specific cloud formations, 325 AFWLU/ HL SWEH-~2 -003);