Currently, the stealth bomber remains in the test flight stage, and is doing two such flights a week, according to Thomas Jones, the Northrop Grumman Aeronautics Systems sector president. A photo shared by the Air Force shows one of the bombers during flight testing.

The B-21 Raider, set to replace the B-2 Spirit, recently completed its maiden flight and is slated to join the U.S. Air Force within a few years. This next-generation stealth bomber promises advanced deep penetration capabilities to counter modern air defense systems.