This U.S. Department of Defense (DoD) handout photo shows the Massive Ordinance Air Blast (MOAB) weapon March 11, 2003 at Eglin Air Force Base, Florida. The 21,000 pound bomb was dropped from a C-130 Hercules aircraft at the Eglin test range March 11, 2003. According to the DoD the MOAB is the largest non-nuclear conventional weapon in existence.

Mother of All Bombs

The GBU-43/B Massive Ordnance Air Blast weapon, colloquially known as the "Mother of All Bombs" is the largest conventional weapon in the U.S. military's arsenal. The MOAB was used for the first time in combat on April 13, striking a network of ISIS-controlled tunnels, caves, and buildings near Achin Afghanistan. The MOAB is a thermobaric device that kills with a super-heated wall of pressurized gasses and is primarily used as a psychological weapon to shock and terrify opposing forces with its massive explosive power, equal to 18,500 pounds of TNT.