U.S. and Iran Hold Rare Talks on Middle East Conflict
Two-week ceasefire is fragile, with both sides accusing each other of violations.
Iranian delegation led by Mohammad Bagher Ghalibaf, 70 members.
Vance warns Iran not to 'try and play us.'. Israeli attacks on Hezbollah threaten ceasefire, as they fall outside agreement.
U.S. clears Strait of Hormuz as crude prices exceed $94.