Days before the first B-21 Raider is set to emerge from Northrop Grumman’s Palmdale, Calif., factory, the company revealed new details about the seven-year-old, largely classified bomber program. Northrop described complementary elements of the B-21 “family of systems”; confirmed a “digital twin” version of the aircraft; and, in a break with previous programs, eliminated the “block upgrade” approach to modernization.#usairforce #northropgrumman #b21raider