When we talk about busting tanks, large guns and missiles pop into our minds. But this job can be done in a very unique way by using a deadly weapon called the Sensor Fused Weapon (SFW). Initially developed as the Cluster Bomb Unit -97 (CBU-97) which was unguided and quite inaccurate when released from high altitudes, it was modified and improved into the CBU-105 with the addition of GPS and tail guidance fins, which made it a very accurate Precision Guided Munition (PGM). The policy of tank-busting of the USAF centers around this weapon which is dropped by a variety of platforms.