The B-21 Raider nuclear bomber is running flight tests, an Air Force spokeswoman confirmed to Inside Defense today. “Flight testing is a critical step in the test campaign managed by the Air Force Test Center and 412th Test Wing’s B-21 Combined Test Force to provide survivable, long-range, penetrating strike capabilities to deter aggression and strategic attacks against the United States, allies and partners,” Ann Stefanek said in an email. First unveiled last December , the B-21 is designed to...