What has been called the "mother of all bombs," the officially named GBU-43 (also known as the Massive Ordnance Air Blast [MOAB]) contains 11 tons of explosives. The bomb was dropped on an ISIS cave complex in the Nangarhar province of Afghanistan which lies on the border of Afghanistan and Pakistan. According to a Pentagon spokesperson, the bomb is the largest non nuclear bomb that the United States of America has in its arsenal.
"The strike was designed to minimize the risk to Afghan and U.S. Forces conducting clearing operations in the area while maximizing the destruction of ISIS-K fighters and facilities," read a statement released by the U.S. Pentagon. ISIS-K is the name for the branch of ISIS based in Afghanistan. "[The Military of the United States of America] took every precaution to avoid civilian casualties with this strike."
The Afghanistan strike had been being planned and strategized for a number of months before it was carried out. According to the U.S. Military, the bomb had been brought into the country explicitly for use in this mission. According to CNN reporter, DavidMartin, General John Nicholson, who is commander of the U.S. forces in Afghanistan, requested the use of the bomb because the cave complex was too well defended to take by foot. White House press secretary, Sean Spicer, said that the military used extreme caution to limit civilian casualties.