In Focus delivers deeper coverage of the political, cultural, and ideological issues shaping America. Published daily by senior writers and experts, these in-depth pieces go beyond the headlines to give readers the full picture. You can find our full list of In Focus pieces here.Iran has tightened its grip on an age-old trade route, once used to transport silk, spices, and Arabian horses, to choke off oil to much of the world and put pressure on the Trump administration. More than 2,000 miles from Iran’s coast, a remote island in the Indian Ocean with a population of roughly 4,000 people…