The air campaign over Iran has entered a new and more aggressive phase. For weeks, the U.S. Air Force B-52H Stratofortress fleet—the venerable backbone of American long-range strike capability—has operated from a safe distance, firing stealthy AGM-158 JASSM cruise missiles from hundreds of miles away. But as of late March 2026, the “Buff” has been spotted trading its long-range scalpel for a heavy-duty sledgehammer.
### The Transition to JDAMs
Recent reports and social media footage from RAF Fairford confirm that B-52s are now taking off loaded with GBU-31 JDAM (Joint Direct Attack Munition) bombs. Unlike the JASSM, which can travel up to 1,000 km, the version of the JDAM being deployed—the unwinged, 900 kg penetrating variant—requires the bomber to fly within a mere 30 km of its target.
This shift in ordnance signals two critical developments in Operation Epic Fury:
- Degraded Air Defenses: The decision to fly a massive, non-stealthy bomber into the “inner ring” of Iranian airspace suggests that U.S. and Israeli strikes have successfully dismantled much of Iran’s integrated air defense system (IADS), including S-300 and Bavar-373 batteries.
- Hardened Targets: The use of 2,000-lb (900 kg) penetrating bombs indicates a focus on “bunker-busting”—targeting deeply buried ballistic missile silos and command-and-control centers that standoff missiles might not effectively neutralize.
### Comparing the Arsenal
The tactical change is best understood by looking at the capabilities of the two primary munitions used in the campaign:
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| Feature | AGM-158 JASSM | GBU-31 JDAM (Penetrating) |
| Type | Stealthy Cruise Missile | GPS-Guided “Smart” Bomb |
| Range | 370 km – 1,000 km | ~24 km – 30 km |
| Warhead | 450 kg (Approx.) | 900 kg (High-Explosive/Penetrator) |
| Primary Use | High-threat, standoff strikes | Close-in, heavy structural destruction |
| Risk Level | Low (Launch from outside ADZ) |
