The B-21 Raider strategic bomber is now flying twice a week, US Air Force officials said, a major step toward the goal of flying them daily.

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 has released the first video footage of the B-21 Raider, which is set to be stationed at Ellsworth Air Force Base, conducting