The White House on Tuesday said it had ordered heightened security of U.S. facilities abroad on the September 11 anniversary, citing the attack that killed four U.S. government employees in Benghazi, Libya, last year. "The president's national security team is taking measures to prevent 9/11 related attacks and to ensure the protection of U.S. persons and facilities abroad," the White House said in a statement. President Barack Obama's counterterrorism aide Lisa Monaco has been in charge of reviewing security measures in place for the anniversary, the White House said. Four Americans including the U.S. ambassador to Libya were killed in...