U.S. expecting Iran response to peace proposal

Washington on Friday was awaiting a response from Iran to its latest proposal for a peace deal.

Speaking in Italy, Secretary of State Marco Rubio said the response was expected "at some point" Friday and that he hopes it will be "a serious offer."

"We'll see what the response entails," he said, adding that the hope is for something "that can put us into a serious process of negotiation."