MOP dropped from a B-52 Stratofortress (Boeing)
The 30,000-lb Massive Ordnance Penetrator Bomb Works So Well It Earned A Rare Honor -- Business Insider
To achieve its goal of blasting through 60 feet of concrete with a bomb exploding at 200 feet underground, Boeing's Massive Ordnance Penetrator (MOP) team just won a prestigious prize.
The group's recognition with the William J. Perry award was delivered by the Precision Strike Association to honor "one of the Secretary of Defense's number one weapons programs."
At over 20 feet in length and weighing 30,000 pounds, the MOP is a precision guided bomb whose first successful test in 2007 led to an Air Force order for eight more worth $28 million in April 2011.
Read more ....
My Comment: The following video explains this weapon system in more detail.