MOSCOW – Russia's top military officer has threatened to carry out a pre-emptive strike on U.S.-led NATO missile defense facilities in Eastern Europe if Washington goes ahead with its controversial plan to build a missile shield. President Dmitry Medvedev said last year that Russia will retaliate militarily if it does not reach an agreement with the United States and NATO on the missile defense system. Chief of General Staff Nikolai Makarov went even further Thursday. "A decision to use destructive force pre-emptively will be taken if the situation worsens," he said at an international conference attended by senior U.S. and...