Will Israel strike Iran? Will the US try to stop them?

Imagine the scenario. A cluster of Israeli F-15I fighter jets takes off from Israel's Palmachim air base. It quickly crosses Israel, makes its way across the Jordan River and within 20 minutes or so reaches the Iraqi border. As the squadron crosses into Iraq, it is met by American F-16 fighters, which demand that the Israeli jets turn back. The Israelis refuse. There's a dogfight. Could it happen