The Army general tapped to lead U.S. European Command and serve as NATO supreme allied commander concurred with top military leaders that Russia poses the greatest threat to the United States. Gen. Curtis Scaparrotti, who currently serves as commander of U.S. Forces Korea, testified April 21 before the Senate Armed Services Committee alongside Air Force Gen. Lori Robinson, the nominee to head U.S. Northern Command. He said he is "concerned" about Russian submarine activity in the Mediterranean and the North...