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TheAGM-87 Focus was anair-to-surface missile developed by the United States.
The missile was a development of theAIM-9B Sidewinderair-to-air missile, intended for use against ground targets. Development took place at theChina Lake Naval Weapons Center during the late 1960s. Theinfrared homing method of the Sidewinder was retained, as the missile was to be used against targets which emitted aninfrared signature. Typical targets included trucks and other such vehicles.
The Focus was used in Vietnam during 1969 and 1970, primarily for night attacks when IR emitters stand out well against the cool background. Although the missile was reportedly quite effective, it was discontinued in favor of other weapons.[specify]
