GlobalSecurity.org: Guided Bomb Unit-28 (GBU-28) Bunker Buster
Facts about the smart bomb bunker buster GBU-28, which is designed to penetrate hardened targets before exploding. Includes specifications and pictures, as well as notes on the EGBU-28.
www.globalsecurity.org/military/systems/munitions/gbu-28.htm
BBC News: Guide to 'bunker-busting' bombs
Information on the laser-guided, conventionally armed Guided Bomb Unit-28, first developed for use during the 1991 Gulf War.
news.bbc.co.uk/2/hi/americas/1593151.stm
How TTR Helped the Air Force Ready a New Bomb
Relates the quick development and deployment of the GBU-28, as well as details of test operations of the bomb at Tonopah Test Range.
www.serve.com/mahood/nellis/ttr/sln4.htm