 “3+2”战略将核武器类型从十二个整合为五个，包括将 B61 型自由下落炸弹的四个变体合为一个(B61-12)，使美国核武库中最后的兆吨级武器 B83 得以退役，并将炸弹数量减少一半。
 The “3+2” strategy consolidates nuclear weapon types from twelve to five, including consolidating from four variants of the B61 gravity bomb into one (B61-12), allowing the B83, the last megaton-class weapon in the U.S. arsenal, to be retired, and reducing the number of bombs by a factor of two.