Inside America’s Bunker Buster Strike: Cost, Power, and Secret Numbers Revealed

From $70,000 bombs to massive underground destruction, here’s how bunker busters work and how often the US has used them

(Source: NPR)

Massive Strike In Iran Raises Questions

Firstly, tension in the Middle East has intensified, moreover the United States launched a major strike in Isfahan, additionally this operation used bunker buster bombs, therefore the attack drew global attention

Meanwhile, the US targeted a large ammunition depot in Isfahan, moreover reports placed the strike in the city’s outskirts, additionally officials suspect key military sites there, therefore the operation carried strategic weight

What Makes Bunker Busters Different

Furthermore, bunker buster bombs differ from regular explosives, moreover they penetrate deep underground before exploding, additionally they break thick concrete layers, therefore they destroy hidden military bases

Additionally, these bombs carry strong steel casings, moreover the casing allows deep penetration, additionally the fuse triggers delayed detonation, therefore explosions occur inside protected structures

Types And Capabilities Explained

Meanwhile, bunker busters come in different sizes, moreover Israel uses 2,000 and 5,000 pound variants, additionally the United States holds the heaviest model, therefore GBU-57 weighs around 30,000 pounds

Moreover, BLU-109 warhead remains widely used, additionally JDAM kits convert it into a smart weapon, therefore it strikes targets accurately even during poor weather

How Much Does One Bomb Cost

Furthermore, bunker busters involve high manufacturing costs, moreover JDAM kits alone cost between $21,000 and $30,000, additionally BLU-109 warheads cost $20,000 to $32,000, therefore total GBU-31 unit cost reaches $40,000 to $70,000

Additionally, in Indian currency, this equals ₹33 lakh to ₹58 lakh, therefore each strike involves significant expense

Destruction Power And Impact Radius

Meanwhile, explosive capacity remains extremely high, moreover each bomb carries about 945 pounds of Tritonal explosive, additionally blast impact kills within 30 to 50 meters, therefore destruction spreads widely

Furthermore, lethal impact reaches 200 to 300 meters, moreover even large buildings collapse instantly, additionally penetration capability reaches 20 to 60 feet concrete, therefore underground facilities face severe risk

US Usage Across Conflicts

Additionally, the United States has used these weapons across multiple wars, moreover first usage occurred during the 1991 Gulf War, additionally GBU-28 bombs targeted Iraqi bases, therefore the strategy proved effective

Moreover, during Iraq and Afghanistan wars, US forces deployed hundreds of penetrator bombs, additionally they targeted caves and bunkers, therefore they eliminated hidden militants

Recent Operations Show Increased Use

Finally, recent months show rising deployment, moreover March 2026 reports confirm use of GBU-57 bombs against Iran, additionally in June 2025, seven bombers dropped around 14 heavy bunker busters, therefore usage has intensified significantly