U.S. Secretary of State Marco Rubio said there are 'good signs' in ongoing negotiations with Iran but warns Washington has 'other options' if diplomacy...

U.S. Secretary of State Marco Rubio said there are 'good signs' in ongoing negotiations with Iran but warns Washington has 'other options' if diplomacy...

Tehran says the gap in position with Washington has narrowed - but the Strait of Hormuz remains a sticking point