Amid mounting concern over Iran’s nuclear program and violence elsewhere in the region, U.S. Central Command quietly dispatched a Marine fighter jet squadron from San Diego to an undisclosed country in the Middle East, U-T San Diego has learned. The deployment follows threats by the U.S. and Israel of military strikes if needed to prevent Iran from developing a nuclear weapon. At the same time, the conflict in Syria is threatening to drag Lebanon, Turkey and Jordan into war, Iraq is beset by renewed violence, and terrorist groups hoping to capitalize on political upheaval in the region covet Syria’s chemical...