Featured in bunker busters

The bunker-busting nuclear bomb that almost was
Thermobaric Bombs And Other Nightmare Weapons Of The Syrian Civil War
Could Iran’s Ultra-Tough Concrete Withstand Bunker-Busting Bombs?
To Locate Underground Threats, Lockheed Scans Subterranean Gravity Signatures
An Autonomous ‘Bot that Burrows Underground to Deliver Deadly Payloads
The Massive Ordnance Penetrator Will Be the Largest Non-Nuclear Bomb Ever
Nuclear Bunker Busters: What’s the Damage?