I read that the Israelis on their attack on the Syrian plant was able to electronically jam these missiles.According to Aviation Week and Space Technology, U.S. industry and military sources speculated that the Israelis may have used technology similar to America’s Suter airborne network attack system to allow their planes to pass undetected by radar into Syria. This would make it possible to feed enemy radar emitters with false targets, and even directly manipulate enemy sensors. Syria is reported to have the new state-of-the art Pantsyr-S1E Russian radar systems.