The B-2 is one of America's most advanced strategic weapons platforms. Photo: US Department of Defense / AFP
The US Air Force's B-2 Spirit stealth bombers were involved in strikes on Iran's nuclear sites.
Three Iranian nuclear sites were struck in a "very successful attack", President Donald Trump said on Saturday (local time), adding that the crown jewel of Tehran's nuclear programme, Fordow, was gone.
The B-2 is one of America's most advanced strategic weapons platforms, capable of entering sophisticated air defences and delivering precision strikes against hardened targets, such as Iran's buried network of nuclear research facilities.
B-2 Spirit specifications
The US B-2 costs about US$2.1 billion (NZ$3.5b) each, making it the most expensive military aircraft ever built. Made by Northrop Grumman, the bomber, with its cutting-edge stealth technology, began its production run in the late 1980s, but was curbed by the fall of the Soviet Union.
Only 21 were made, after the Pentagon's planned acquisition programme was truncated.
The bomber's range of more than 11,112 km without refuelling enables global strike capabilities from continental US bases. With aerial refueling, the B-2 can reach virtually any target worldwide, as demonstrated in missions from Missouri to Afghanistan and Libya, and now Iran.
Its payload capacity of more than 18,144 kg allows the aircraft to carry a diverse array of conventional and nuclear weapons. The bomber's internal weapons bays are specifically designed to maintain stealth characteristics, while accommodating large ordnance loads that could include two GBU-57A/B MOP (Massive Ordnance Penetrator), a 13,600kg precision-guided 'bunker buster' bomb.
Reports said six bunker buster bombs were used on Iran's Fordow research site.
The B-2's two-pilot crew configuration reduces personnel requirements, while maintaining operational effectiveness through advanced automation systems.
Iran's Fordow research site on 14 June, 2025, well before it was hit by a reported six bunker-busters. Photo: AFP
The B-2's stealth technology incorporates radar-absorbing materials and angular design features that minimise detection by enemy air defence systems. Its radar cross-section is reportedly comparable to that of a small bird, making it nearly invisible to conventional radar.
Massive Ordnance Penetrator (MOP)
The 13,600kg MOP represents the largest conventional bomb in the US arsenal, specifically engineered to defeat hardened underground bunkers. Its massive size requires the B-2 to carry only one or two MOPs per mission, but provides unmatched bunker-penetration capability.
The weapon's 6.25m length and GPS-guided precision targeting system enable accurate strikes against specific underground facilities. Its penetration capability of more than 60 metres through hardened concrete makes it effective against the world's most protected underground installations.
Conventional payloads
Joint Direct Attack Munitions (JDAM) provide the B-2 with precision conventional strike capability against fixed targets. These GPS-guided weapons can be deployed in large numbers, with the bomber capable of simultaneously engaging multiple targets with high accuracy.
Joint Standoff Weapons (JSOW) extend the aircraft's engagement range, while maintaining stealth characteristics during approach. These glide bombs allow the B-2 to strike targets from outside heavily defended airspace perimeters.
Joint Air-to-Surface Standoff Missiles (JASSM) offer long-range precision strike capability with their own stealth features. The extended-range JASSM-ER variant provides strike options against targets over 800km) away.
Nuclear payload capabilities
The B-2 Spirit serves as a key component of America's nuclear triad, capable of delivering strategic nuclear weapons with stealth and precision. The aircraft can carry up to 16 B83 nuclear bombs.
- Reuters
