From Flight Global:
The US Air Force today revealed plans to acquire a small arsenal of a new 13,600kg (30,000lb) penetrator bomb to deploy on Northrop Grumman B-2As in three years.
The USAF's public notice follows several years of testing the Boeing GBU57A/B Massive Ordnance Penetrator (MOP), which is designed to destroy hardened bunkers buried deeply underground.
Read more ....
My Comment: I guess the B-2 now has a mission .... quite an expensive tool to use for a mission.