Incredible Facts About the B-2 Spirit 4. The B-21 Raider is being developed behind closed doors as we speak. The earliest estimations have the B-21 taking over for the B-2 as the United States’ predominant stealth-bomber by 2030. Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50