Iran on Sunday began an annual air force drill in the central part of country, state media reported, as the U.S. sends more fighter planes to the region to deter the Islamic Republic from seizing commercial vessels in the Persian Gulf area. The official IRNA news agency said 11 Iranian air force bases participated in the drill, dubbed Fadaeian Velyat-11, or Devotees of the Supreme Leader-11. It said an air base at the southern port of Bandar Abbas at the mouth of the strategic Strait of Hormuz i