Bunker buster - Wikipedia, the free encyclopedia http://en.m.wikipedia.org/wiki/Bunker_buster BLU-116 Advanced Unitary Penetrator (AUP) GBU-15, GBU-24, GBU-27, AGM-130 BLU-118/B Thermobaric Warhead GBU-15, GBU-24, AGM-130Penetration of reinforced concrete: more than 6 m (20 ft) BLU-113 Super Penetrator GBU-28, GBU-37 More recently, the US has developed the 30,000-pound GBU-57.

http://en.m.wikipedia.org/wiki/Bunker_buster