This week marks the 20th anniversary of the deployment to Guam of one of America's most important and expensive weapon systems — the B-2 Spirit.
The B-2 was originally intended to carry nuclear bombs deep into Soviet territory if the Cold War had ever turned hot. Its shape — paired with the plane's stealth systems — would enable it to be undetected by Soviet radars. The B-2's long range meant it could fly deep into enemy territory and return home.
With the collapse of the Soviet Union and the end of the Cold War, the B-2 has been used as a conventional bomber. It made its combat debut during the Kosovo War in 1999, and has since flown sorties in Afghanistan, Iraq, and Libya.
More recently, the B-2 has been placed in bases in the Pacific as part of a strategy to deal with potential threats from North Korea.
Here's why it's one of the most feared aircraft in the world: