The Space Force's reusable, robotic craft is carrying classified experiments. There's no one on board.
The Pentagon has grown increasingly concerned about the potential for a conflict with China, which would require improved maritime capabilities.
Boeing expects the Air Force will order its first set of operational T-7A Red Hawk aircraft in 2024.
The Advancing Aeronautics Expo before the B-21 rollout was a display of aviation history, all the way back to the Doolittle Raiders of World War II.
