So, of course, it's MOP

U.S. spends $32 million to make eight 30,000-pound bombs | The Raw Story

WASHINGTON — The US Air Force has a new 30,000-pound bomb in its arsenal designed to penetrate targets buried deep underground, a spokesman said Tuesday.

The Air Force started taking delivery of the giant bomb, the “Massive Ordnance Penetrator,” in September, said Lieutenant Colonel Jack Miller.