The Army has destroyed about half of the 2,600 tons (about 2,360 metric tons) of mustard agent contained in decades-old shells stored at a southern Colorado chemical depot.
The Army has resumed destruction of obsolete chemical weapons in southern Colorado after a shutdown prompted by liquid hazardous waste seeping from a storage tank.
A highly automated, multibillion-dollar plant in Colorado that destroys U.S. chemical weapons is over budget, behind schedule and bedeviled by troubles that could worsen the danger to workers.
The U.S. Army wants to change the way it destroys part of its huge stockpile of obsolete chemical weapons in Colorado, but some people worry that could increase the chances of contamination escaping into the air.
A Colorado Army facility where chemical weapons are being destroyed has suspended shipping wastewater to a Texas incinerator because of Tropical Storm Harvey.
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