When and if the United States does go to war, military sources say the United States is preparing a monster new weapon to be used during the first nights. It's called MOAB, short for "massive ordnance air burst" bomb. It is a modern, bigger version of the 15,000-pound "Daisy Cutter" used in Vietnam, the Persian Gulf War and Afghanistan. Sources say MOAB -- still experimental -- is a 21,000-pound bomb that will be pushed out the back of a C-130 transport and guided by satellite. Because it is not dropped by parachute, as was the old Daisy Cutter, the aircraft can let it go from far higher altitudes, making it safer for U.S. pilots. The MOAB's massive explosive punch, sources say, is similar to a small nuclear weapon.