U.S. intelligence agencies believe that Russia is likely to retaliate with greater force against the United States and its coalition partners, possibly with lethal attacks, if they agree to give the Ukrainians permission to employ U.S., British and French-supplied long-range missiles for strikes deep inside Russia, U.S. officials said. The intelligence assessment, which has not been previously reported, also plays down the effect that the long-range missiles will have on the course of the conflict because the Ukrainians currently have limited numbers of the weapons and it is unclear how many more, if any, the Western allies might provide. The...