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The U.S. Army began destroying the nation's largest remaining stockpile
of chemical weapons on March 18, using explosives to rip open a
container of mustard agent inside a sealed chamber and then flooding it
with another chemical to neutralize it. It was the first few pounds of 2,600 tons of mustard agent that will be destroyed at Pueblo Chemical Depot in southern Colorado, most of it contained in about 780,000 shells...........US begins destroying its largest cache of chemical weapons
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