The first round of direct U.S.-Iran peace talks occurred over the weekend in Islamabad, Pakistan, but ended without agreement, prompting the U.S. to impose a blockade on Iranian ports and the Strait of Hormuz. A war began on February 28, followed by a two-week ceasefire and U.S.-Israel airstrikes near Tehran. Negotiators may return to Islamabad this week amid unverified details on terms and internal Iranian dynamics.