GBU-57 Ground-Penetrating Bomb USAF Published May 22, 2023 at 621 × 325 in Morning Prayer 23.5.23, Tuesday after Ascension Day Next → The United States released, then quickly withdrew this photo of a giant bomb, a GBU-57 ground penetrator, at an air base in Missouri last week, causing speculation about both the reveal and the withdrawal. (USAF)