Decades behind schedule, US now destroying last of its chemical weapons

In a sealed room behind a gantlet of armed guards and three rows of high barbed wire at the Army’s Pueblo Chemical Depot in Colorado, a team of robotic arms was busily disassembling some of the last of the United States’ vast and ghastly stockpile of chemical weapons.

In went artillery shells filled with deadly mustard agent that the Army had been storing for more than 70 years. The bright yellow robots pierced, drained and washed each shell, then baked it at 1,500 degrees Fahrenheit. Out came inert and harmless scrap metal, falling off a conveyor belt into an ordinary brown dumpster with a resounding clank.

“That’s the sound of a chemical weapon dying,” said Kingston Reif, who spent years pushing for disarmament outside government and is now the deputy assistant secretary of defense for threat reduction and arms control. He smiled as another shell clanked into the dumpster.

The destruction of the stockpile has taken decades, and the Army says the work is just about finished. The depot near Pueblo destroyed its last weapon in June; the remaining handful at another depot in Kentucky will be destroyed in the next few days. And when they are gone, all of the world’s publicly declared chemical weapons will have been eliminated.

The American stockpile, built up over generations, was shocking in its scale: Cluster bombs and land mines filled with nerve agent. Artillery shells that could blanket whole forests with a blistering mustard fog. Tanks full of poison that could be loaded on jets and sprayed on targets below.  

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