The U.S. Air Force's B-2 stealth bomber is a key component of the nation's long-range strike arsenal, and one of the most survivable aircraft in the world. Its unique stealth characteristics allow it to penetrate the most sophisticated enemy defenses., B-2 stealth bomber is a first-of-its-kind arsenal in the US Air Force and has been the backbone of the American stealth technology for three decades. After its first flight in 1989, the aircraft remains one of the most survivable aircraft in the world, with the capability to penetrate the most sophisticated enemy defences, according to its , The B-2 provides the penetrating flexibility and effectiveness inherent in manned bombers. Its low-observable, or "stealth," characteristics give it the unique ability to penetrate an enemy's most sophisticated defenses and threaten its most valued, and heavily defended, targets., B-2 stealth bombers are reportedly involved in the US's strikes on Iran's three nuclear sites. (Reuters: US Air National Guard) What is a B-2 stealth bomber? The US B-2 bombers, touted as the most , B-2 Spirit stealth bombers based at Whiteman Air Force Base in Missouri were part of the U.S. military operation that targeted three locations in Iran, ABC News reports. The mission marked the , WASHINGTON – As many as six stealth B-2 bombers departed their home at Whiteman Air Force Base in Missouri and headed west over the Pacific, Al-Monitor can confirm, as the White House threatens to join Israel's strike campaign against Iran. Open-source tracking sites picked up at least six B-2s .