Chicago based Boeing manufactures the MOP shown here for scale. Boeing
The Pentagon's New 30,000-lb MOP Bomb Is Ready To Go -- Business Insider
Senior Pentagon officials told Congress the nation's largest conventional bomb, the Massive Ordnance Penetrator (MOP), is ready for action.
The Air Force said as much back in June after rushing the MOP back to Boeing for $82 million in modifications and enhancements, but this report puts it on the books as deployable ordnance.
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Update: Boeing’s 30,000-Pound Bunker-Buster Improved, U.S. Says -- Bloomberg Businessweek
My Comment: That's one big bomb.