American travelers in the Middle East are being urged to stay alert as US officials warn that security conditions remain volatile across the region, even as Washington, D.C., and Tehran move toward a tentative agreement aimed at easing the latest crisis . The warning comes as US officials describe a  draft agreement with Iran  that could reopen the Strait of Hormuz, allow some Iranian oil sales to resume, and restart talks over Tehran’s nuclear program, as Fox News Digital has reported —