The United States has the second largest stash of nuclear warheads in the world after Russia. Some of them are kept at Minot, Air Force base. One warhead is capable of killing about 100,000 people or more.
But even more worrying, this week 17 airmen guarding the nuclear launch controls at the base scored a "D" for performance, and were stripped of their duties.
Our Kyung Lah went to the heavily guarded facility and is OutFront with an investigation into what the military is doing to fix the problem.