Wild Weasel is a nickname for aircraft of the United States Air Force tasked with the Suppression of Enemy Air Defenses (SEAD) mission. Initially known by the operational code "IRON HAND" when first authorized on August 12, 1965, the term "Wild Weasel" derives from Project Wild Weasel, the USAF development program for a dedicated SAM-detection and suppression aircraft. Originally named "Project Ferret", denoting a predatory animal that goes into its prey's den to kill it (hence: "to ferret out"), the name was changed to differentiate it from the code-name "Ferret" that had been used during World War II for radar counter-measures bombers.

In brief, the task of a Wild Weasel aircraft is to bait enemy anti-aircraft defenses into targeting it with their radars, whereupon the radar waves are traced back to their source so that the Weasel or its teammates can precisely target it for destruction. A simple analogy is playing the game of "flashlight tag" in the dark; a flashlight is usually the only reliable means of identifying someone in order to "tag" (destroy) them, but the light immediately renders the bearer able to be identified and attacked as well. The result is a hectic game of cat-and-mouse in which the radar "flashlights" are rapidly cycled on and off in an attempt to identify and kill the target before the target is able to home in on the emitted radar "light" and destroy the site.

The technique (or a specific part) was also called an 'Iron Hand' mission, though technically the Iron Hand part refers only to a suppression attack that paves the way for the main strike.

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