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 U.S. Air Force's B-21 Raider stealth bomber is advancing well in its flight testing phase, flying up to twice weekly. Designed to replace the B-2 Spirit and B-1 Lancer, the B-21 aims to enhance the Air Force's long-range strike capabilities with modern stealth technology.