Watch: : Pentagon debuts new B-21 stealth bomber

America’s newest nuclear stealth bomber made its debut Friday after years of secret development and as part of the Pentagon’s answer to rising concerns over a future conflict with China.The B-21 Raider is the first new American bomber aircraft in more than 30 years. Almost every aspect of the program is classified.As evening fell over the Air Force’s Plant 42 in Palmdale, the public got its first glimpse of the Raider in a tightly controlled ceremony. It started with a flyover of the three bombers still in service: the B-52 Stratofortress, the B-1 Lancer and the B-2 Spirit. Then the hangar doors slowly opened and the B-21 was towed partially out of the building.