To clarify, they are unable to verify the location of 1,160 kilograms out of 17,500 kilograms of U.S. enriched uranium has sent overseas since January 1993.

That follows a 1992 congressional mandate issued after the NRC and DOE could not fully account for the location and disposition of U.S. enriched uranium overseas at that time.

To point out the gravity of the situation, that is enough weapons grade nuclear material to wipe hundreds of major cities around the globe completely off the map

http://alexanderhiggins.com/us-nuclear-materials-missing-at-home-and-overseas/

GAO report which reveals serious safety issues with nuclear regulations reveals the US has lost track of nuclear materials overseas>>17508297