W64

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This article is about the nuclear weapon. For the audio format, see WAV.

The W-64 nuclear warhead was the Los Alamos Laboratory's entry into a brief competition between Lawrence Livermore Laboratory and Los Alamos to design an "enhanced-radiation" nuclear warhead (i.e., a "neutron bomb") for the United States Army's MGM-52 Lance tactical surface-to-surface missile. In July 1964, both Livermore Labs and Los Alamos started developing competing warheads for the Lance. The Los Alamos design, the W-64, was canceled in September 1964 in favor of Livermore's W-63. In November 1966, the W-63 was canceled in favor of the W-70, the model that finally entered production.