It happens to all of us. Just when you least expect it—or precisely because you weren't expecting it—you lose track of something valuable. Sometimes it's your keys, other times it's a favorite hat.

Unsurprisingly, the premise of lost, missing, or stolen weapons of mass destruction—be they chemical, biological, radiological, or nuclear—has been the plot line of many a fictional thriller story.

The U.S. Air Force is buying more GBU-57, or the Massive Ordnance Penetrator, bunker-buster bombs from Boeing to replace the weapons used to strike Iran's nuclear facilities in 2025. (U.S. Air Force) ...