The United States began its biggest European deployment of F-22 fighters with a visit to the Black Sea in an exercise aimed at beefing up military support for NATO’s eastern European allies who say they face aggression from Russia. President Barack Obama promised in 2014 to bolster the defences of NATO’s eastern members which were spooked by Russia’s annexation of Ukraine’s Crimean peninsula and the Kremlin’s use of pro-Russian forces in eastern Ukraine. A U.S. […]