The U.S. Just Dropped the ‘Mother of All Bombs’ in Afghanistan. But What Is That?

The United States on Thursday dropped “the mother of all bombs,” the largest non-nuclear bomb it has ever used in combat, on an ISIS tunnel and cave complex in eastern Afghanistan.

The bomb, officially called the GBU-43/B Massive Ordnance Air Blast (MOAB), was dropped from a MC-130 aircraft in the Achin district of Nangarhar province, Pentagon spokesman Adam Stump said, according to the Associated Press. The target was near Afghanistan’s border with Pakistan.