Fears of a nuclear arms race rise as New START expires

The Feb. 5 expiration of the last key U.S.-Russia arms-control agreement, combined with uncertainty about the U.S. commitment to defend European allies, has U.S. lawmakers and former officials worried about the prospects of nuclear proliferation and a new arms race.“We've seen agitation between this administration and many of our allies, and there is renewed interest, I think, in many countries, particularly in Europe, Japan, and South Korea, in having their own nuclear-deterrence systems