Massive Ordnance Penetrator

GBU-57A/B Massive Ordnance Penetrator (MOP) adalah bom Angkatan Udara A.S., yang dipandu dengan presisi, 30.000 pon (14.000 kg). Ini jauh lebih besar daripada busters bunker penetrasi terdalam yang tersedia sebelumnya, GBU-28 (GBU-28) seberat 5.000 pon (2.300 kg) dan GBU-37.

Referensi 

 Massive Ordnance Penetrator Fact Sheet —dtra.mil
 First Massive Ordnance Penetrator Explosive Test Successful—dtra.mil
 Boeing-Developed Massive Ordnance Penetrator Successfully Completes Static Lethality Test—Boeing
 'Bunker busters' may grow to 30,000 pounds—CNN
 Massive bomb to MOP up deeply buried targets—Jane's Defence Weekly
 A different kind of smart: weapons becoming autonomous and precise—Jane's
 Massive Ordnance Penetrator (MOP)—GlobalSecurity.org
 U.S. Outfitting B-2's with Monster Bunker Buster Bombs - Iran May Be Target —NewsMax
 MOPping Up: The USA's 30,000 Pound Bomb
 Kennedy-Feinstein Amendment to the Defense Authorization Bill on the Robust Nuclear Earth Penetrator (RNEP)
 Rare image of a B-2 stealth bomber and its Massive Ordnance Penetrator bunker buster bomb

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