The United States has seen some progress towards a deal with Iran but more work is required, Secretary of State Marco Rubio said on Friday, while Iran's foreign ministry spokesman said the two ‌sides' differences were deep and significant. Intensifying diplomacy to end the conflict, Pakistan's military chief arrived in…

May 22 (UPI) -- The United States and Iran implied Friday that there was progress in peace talks but Tehran's uranium and tolls for the Strait of Hormuz were sticking points.