The Air Force is expected to build 100 of the aircraft, some with pilots and some without, which will combine with Boeing's B-52 strategic bombers to replace the existing fleet of B-1 and B-2 bombers.

At a top-secret factory in the California desert the Air Force is building its new B-21 bomber, a stealthy bat-winged jet that is designed to slip behind any adversary’s air defense system and ...

The idea here was to build a bomber that could fly at mach 2 at high level, but also to fly faster than the B-52 at low altitudes. It was to cost $10 billion for 240 aircraft ($40 million per plane).

With the aircraft's high cost, the government slashed its initial order of B-2s from 132 down to 21. Even with only a handful of Spirits in active duty, it's not a cheap plane to update.

The Air Force said the "B-21" designation was chosen because the aircraft is the first new bomber of the 21st century, while the name "Raider" was selected to represent the Doolittle Raiders, who ...

The B-2 Spirit Bomber, Northrop Grumman's stealth bomber built in the 1990s, was plagued by cost overruns and is one of the world's most expensive aircraft to operate.