The U.S. military
dropped its largest non-nuclear bomb in eastern Afghanistan on Thursday, just
days after a Green Beret was killed fighting ISIS there, a U.S. defense
official confirmed to Fox News.
The GBU-43B, a
21,000-pound conventional bomb, was dropped on an ISIS tunnel complex in
Nangarhar Province.
The Massive Ordinance
Air Blast was first tested in 2003. (DOD)
The MOAB -- Massive
Ordinance Air Blast -- is also known as the “Mother Of All bombs.” It was first
tested in 2003, but hadn't been used in combat before Thursday.
The MOAB is so massive
it had to be dropped out of the back of a U.S. Air Force C-130 cargo plane.
"We kicked it out
the back door," one U.S. official told Fox News.
For comparison to the
21,000-pound MOAB, each Tomahawk cruise missile launched at a Syrian military
air base last week was 1,000-pounds each.
"As [ISIS'] losses
have mounted, they are using IEDs, bunkers and tunnels to thicken their
defense," Gen. John Nicholson, commander of U.S. forces in Afghanistan,
said in a statement. "This is the right munition to reduce these obstacles
and maintain the momentum of our offensive against [ISIS]."
The statement said U.S.
forces took every precaution to avoid civilian casualties.
Lucas Tomlinson is the
Pentagon and State Department producer for Fox News Channel. You can follow him
on Twitter: @LucasFoxNews