The US secretary of state's remarks come after the US deployed an aircraft carrier strike group and nuclear-capable B-52 bombers to the Middle East. Meanwhile, Iran's Supreme Leader Ayatollah Ali Khamenei said there would be no war with the US.
The regime's Deputy Foreign Minister Faisal Mekdad says Tel Aviv will have to make accurate calculations "if it thinks to attack Syria again." It comes after Russia announced the delivery of S-300s to Bashar al Assad's regime within two weeks.