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...