USAF deploying new variant of GBU-57

Capt. Emily Grabowski, a U.S. Air Force spokeswoman, has confirmed to Bloomberg that the GBU-57 has gotten a fourth upgrade and the new variant is being deployed in the service.

B-52 releases the MOP during a weapons test
By DoD photo (https://www.flickr.com/photos/dod_dtra/4327700817/) [Public domain], via Wikimedia Commons