Boeing, one of the biggest U.S. defense contractor, has received a $21,6 million contract modification for GBU-57 Massive Ordnance Penetrator or commonly known as “bunker buster” bombs, according to a statement released by the U.S. Department of Defense on 12 April.

The modification to the previously awarded contract calls for the extends the ordering period an additional four years and increases the order ceiling price to cover the extension.

Work will be performed in St. Louis, Missouri, and is expected to be complete by July 18, 2023.

The Air Force Life Cycle Management Center is the contracting activity.

For reference, super bombs so big that only two can be carried at one time.

The GBU-57 Massive Ordnance Penetrator is a 30,000-pound class GPS-guided “bunker buster” bomb designed to accomplish a difficult, complicated mission of reaching and destroying adversaries’ weapons located in well-protected facilities.

Some source said that “bunker buster” bomb by the U.S. Air Force to be able to penetrate up to 200 feet of concrete before exploding. It is more powerful than its predecessor, the BLU-109.