The U.S. withdrew from treaty negotiations on President Trump's first day in office.

Since 1947, India and Pakistan have been locked in conflict over Kashmir, a majority-Muslim region in the northernmost part of India. The mountainous, 86,000-square-mile territory was once a ...

Still others say chemical or nuclear weapons are much easier and more straightforward to use for mass destruction (although their treaty regimes are much stronger than those of the BWC).