The U.S. military claims it has successfully begun enforcing a blockade of Iranian ports, escalating tensions with Iran. The Islamic Republic has threatened regional strikes. Recent talks between the U.S. and Iran ended without an agreement, but President Donald Trump suggested a second round could take place in the next two days. Meanwhile, Lebanon and Israel opened their first direct diplomatic talks in decades in Washington, as fierce fighting between the Israeli military and Hezbollah militants rocks southern Lebanon. U.S. Secretary of State Marco Rubio took part, joining the Israeli and Lebanese ambassadors to the U.S.