On March 19, 2003, U.S. missiles and bunker-busting bombs dropped by air struck targets inside Iraq, paving the way for a ground invasion by U.S.-led forces the next day that eventually overthrew President Saddam Hussein's regime on April 9.

WSJ: Wave of Deadly Attacks Hits Baghdad

Israel has large bunker-buster bombs but the U.S. hasn't provided the MOP to any other country.

WSJ: Pentagon Seeks Mightier Bomb vs. Iran