Photo courtesy Air Force
GBU-28 Bunker Buster
There are thousands of military facilities around the world that defy conventional attack. Caves in Afghanistan burrow into mountainsides, and immense concrete bunkers lie buried deep in the sand in Iraq. These hardened facilities house command centers, ammunition depots and research labs that are either of strategic importance or vital to waging war. Because they are underground, they are hard to find and extremely difficult to strike.

The U.S. military has developed several different weapons to attack these underground fortresses. Known as bunker busters, these bombs penetrate deep into the earth or right through a dozen feet of reinforced concrete before exploding. These bombs have made it possible to reach and destroy facilities that would have been impossible to attack otherwise.

Photo courtesy Air Force
F-111 & GBU-28 "Bunker Buster"

In this edition of HowStuffWorks, you will learn about several different types of bunker buster so you understand how they work and where the technology is heading.