April 13 (UPI) -- The U.S. Air Force dropped its largest non-nuclear bomb for the first time in combat on Thursday, targeting an underground Islamic State complex in a desolate portion of eastern Afghanistan, military officials said.
The 21,000-pound bomb is known as the Massive Ordinance Air Blast bomb, or MOAB. In military circles, the acronym is known better as the "Mother of All Bombs."