[Iran Claims to Have Successfully Destroyed Three U.S. Massive Ordnance Penetrators] Odaily Planet Daily News - On April 26 local time, Iran's Islamic Revolutionary Guard Corps stated that its special forces had successfully destroyed three U.S. GBU-57 massive ordnance penetrators and dismantled another one left behind in Iran's Zanjan Province. The GBU-57 penetrator bomb (also known as a bunker buster) is a heavy-duty penetrator bomb developed by the United States. This type of bomb was used by the U.S. in military operations last year targeting Iran's nuclear facilities and has also been extensively deployed in this year's U.S.-Iran conflict. (CCTV)