One day before a planned naval drill by Iran in the Strait of Hormuz, an explosion tore through an apartment building Saturday in the Iranian port city of Bandar Abbas, which sits on the strait. The blast killed a 4-year-old girl as local media footage purportedly showed a security force member being carried out by rescuers. Iran is planning a naval drill Sunday and Monday in the strait, the narrow mouth of the Persian Gulf through which a fifth of all oil traded passes. The U.S. military has