Air Force tested a Massive Ordnance Air Blast weapon on AFB Eglin on 03/11/2003. Eglin Air Force Base, FL is home of the Air Armament Center (AAC).
The MOAB is a precision-guided munition weighing 21,500 pounds and was dropped from a C-130 Hercules aircraft for the test. It is the largest non-nuclear weapon in existence.
The weapon is meant to allow pilots to drop high-precision bombs out of the range of most anti-aircraft fire. MOAB is a "modernization" of the BLU-82 "Daisy Cutter".

Primary Function: Guided air-to-surface weapon

Guidance System: GPS/inertial gyroscopes

Launch Weight: 21,500 pounds, incl. 18,000 pounds of high explosives

Diameter: 40.5 inches

Contractor: Dynetics

The MOAB is an Air Force Research Laboratory technology project that began in fiscal year 2002 and is to be completed this year.