Incredible Facts About the B-2 Spirit 14. The United States’ fleet of bombers, which consist of the B-1 Lancer, B-2 Spirit, and B-52 Stratofortress are getting old. These aircraft are an average of 33 years old per plane. 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