U.S. forces in Afghanistan struck an Islamic State tunnel complex April 13, 2017, in eastern Afghanistan with "the mother of all bombs," the largest non-nuclear weapon ever used in combat by the U.S. military, Pentagon officials said.
The bomb, known officially as a GBU-43B, or massive ordnance air blast weapon, unleashes 11 tons of explosives and a blast radius of one mile. When it was developed in the early 2000s, the Pentagon did a formal review of legal justification for its combat use.
