Mark Thompson recalls other NFZs:

The U.N. -- but actually, largely the U.S. -- maintained no-fly zones over northern and southern Iraq for about a decade following the first Gulf War in 1991. ... The Iraqis never succeeded in shooting down a U.S. or allied plane patrolling the no-fly zones -- they flew more than 250,000 sorties -- despite the promise of cash bounties for any Iraqi who downed a plane. But the U.S. Air Force did succeed -- after misidentifying a pair of aircraft as Russian-built Iraqi Hind helicopters -- in downing two U.S. Army UH-60 Black Hawks in 1994, killing all 26 aboard.

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