Chemical agents in Madison County are among the only weapons left to destroy, according to the U.S. Army.
The army says it's wrapping up work, destroying weapons this week in Utah, and that means 90 percent of the nation's stockpile is now gone.
The army says this leaves mustard agent in Pueblo, Colorado, and mustand and nerve agent in Madison County as the only things left to go. But the army says it will take until 2021 to finish that work.
