According to the 
Pacific Daily News, USAF forces on Guam Monday unveiled the $32.8 million hangar built to house B-2 stealth bombers at Andersen Air Force Base. The hangar was built of concrete and steel meant to withstand typhoons registering in at 170 mph and major earthquakes, both not infrequent events for the Pacific island. It also has an electronic firefighting system that can spray foam fire retardant over an entire aircraft within four minutes. It will house two B-2 bombers at one time. Read our story here about the Pacific region buildup.
A yearslong effort to find an affordable way to turn cargo planes into strike platforms is now an official program with anticipated fielding in 2027.