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• n  a 5,000 pound laser-guided bomb that can be programmed to penetrate to a given depth before exploding; used to penetrate hardened underground facilities

• Bunker Buster
• Guided Bomb Unit-28
• GBU-28

News & Articles

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• America's Tactical Nukes Are Worth Twice Their Weight in Gold
  The GBU-57A-B is by far America's biggest bunker buster, but it's not actually our most powerful one. That acclaim goes to the deep diving, hard hitting, supersonic B-61 tactical nuclear bomb. And we're about to spend more than $11 billion to ensure they stay on the front lines through the middle of the next decade. Read more...
  April 25, 2014 - Gizmodo