Israeli officials believe that Iran is winning its bid for dominance in the Middle East, and they are mobilizing to counter the regional realignment that threatens to follow. The focus of Israel’s military and diplomatic campaign is Syria. Israeli jets have struck Hezbollah and Syrian regime facilities and convoys dozens of times during Syria’s civil war, with the goal of preventing the transfer of weapons systems from Iran to Hezbollah. In an apparent broadening of the scope of this air campaign, on Sept. 7 Israeli jets struck a Syrian weapons facility near Masyaf responsible for the production of chemical weapons and the storing of surface-to-surface missiles.