In 1967, Detroit, President Johnson sent in the Army’s 82nd and 101st Airborne Divisions. The result was 43 dead, 1,189 injured, over 7,200 arrests, and more than 2,000 buildings destroyed.
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My brother was one of them, an MP. He manned a .50 cal, they used recoilless rifles also. They free fired at will.
BTW, Mitt Romney should remember, his Dad was Governor of Michigan at the time.