Incredible Facts About the B-2 Spirit 39. The B-2 was developed as a “Gray Project”, meaning that its development was a secret to the public but was known by certain government agencies and officials. 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