Moscow last year significantly dialed back the number of long-range bomber sorties sent in the direction of the United States, a change that belies what a top U.S. military commander says is a "troubling" new capability: a Russian project to outfit its bomber fleet with cruise missiles that can hold the U.S. and Canada at risk. Gen. Lori Robinson, head of U.S. Northern Command, told the Senate Armed Services Committee in prepared testimony that Russia's Long Range Aviation Command --...