W49 (nuclear weapon)

W49 nuclear weapons were U.S. Air Force thermonuclear warheads, with a 1.44 MT yield, for intermediate range (IRBM) and intercontinental ballistic missiles (ICBM), in use from roughly 1959 to 1964. They were aboard various models of the:
 * PGM/CGM/HGM-16 Atlas ICBM; W49 Mod 0, 1
 * PGM-17 Thor IRBM; W49 Mod 0,1, 3
 * HGM-25 Titan ICBM
 * PGM-19 Jupiter IRBM; Mod 0, 1, 3, 5

It succeeded the W35 and was adapted from the W28, equipped with a Category A Permissive Action Link.