The main force behind the operation was the US Air Force’s B-2 Spirit stealth bombers, the only aircraft capable of delivering bombs powerful enough to penetrate Iran’s underground nuclear facilities. 

B-2 Bombers, Bunker busters, Tomahawk missiles: What weapons did US use to 'completely obliterate' Iran’s key nuclear sites?

The B-21 incorporates next-generation stealth materials and design improvements. It is built to evade the latest radar systems, including those used by emerging military powers. The Air Force expects it to survive in heavily contested airspace where older bombers might be detected.

Why B-2 Bomber could be replaced with B-21 Raider?

The B-1B Lancer is a long-range, supersonic conventional bomber, multi-mission, designed for nuclear capabilities. Whereas, B-2 Spirit bombers, which were used recently by the US against Iran, are designed for deep-penetration missions in contested airspace.

B-1 Lancer vs B-2 Spirit bomber: Which one would survive WWIII?

The B-2 can carry two 15-ton bunker-buster bombs, which are possessed by America only. According to experts, bunker buster bombs are needed to target Iran’s most heavily fortified Fordow nuclear site.

American B-2 stealth bombers take off from US base amid Iran’s 'dangerous' warning to US - What’s next for Israel-Iran war?

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B-2 Bombers, Bunker busters, Tomahawk missiles: What weapons did US use to 'completely obliterate' Iran’s key nuclear sites?

Why B-2 Bomber could be replaced with B-21 Raider?

B-1 Lancer vs B-2 Spirit bomber: Which one would survive WWIII?

American B-2 stealth bombers take off from US base amid Iran’s warning to US