BI671 T-12 22 ton Bomb
Visit to the Aberdeen Proving Grounds Ordnance Museum, 23 Oct 2004.
"The T-12 demolition bomb was a weapon produced by the United States designed to create an earth quake bomb effect. It achieved this by having an extremely thick nose section, which was designed to penetrate deeply into the earth. It was designed to attack targets invulnerable to conventional "soft" bombs, such as bunkers and viaducts."