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...

U.S. Secretary of State Marco Rubio says there's been "slight progress" in talks with Iran, amid uncertainty about a potential deal or renewed conflict.