FILE - In this Jan. 29, 2015, file photo, a remotely controlled robot handles an inert simulated chemical munition during training at the Pueblo Chemical Depot in southern Colorado. The Army announced Wednesday, June 13, 2018, the depot had resumed destroying decades-old shells containing liquid mustard agent this week. The plant had been shut down for repairs since September. (AP Photo/Brennan Linsley, File)
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