U.S. destroys last of its declared chemical weapons, closing a deadly chapter dating to World War I

The last of the United States’ declared chemical weapons stockpile was destroyed at a sprawling military installation in eastern Kentucky, Senate Republican leader Mitch McConnell announced Friday, a milestone that closes a chapter of warfare dating back to World War I.

Workers at the Blue Grass Army Depot in Kentucky destroyed rockets filled with GB nerve agent, completing a decadeslong campaign to eliminate a stockpile that by the end of the Cold War totaled more than 30,000 tons.

“Chemical weapons are responsible for some of the most horrific episodes of human loss,” McConnell said in a statement. “Though the use of these deadly agents will always be a stain on history, today our nation has finally fulfilled our promise to rid our arsenal of this evil.