S-300 air defense systems. © RIA Novosti. Dmitriy Korobeinikov
An Israeli Attack On New Syrian Missiles Would 'Kill A Lot Of Russians' -- Business Insider
The S300 anti-aircraft missiles that Russia has reportedly started sending to Syria don't just pose a threat to Israeli or American pilots; they also pose a threat to Russians on the ground.
If Israel or the U.S. bomb the S300 weapons in Syria, there's a good chance they "will kill a lot of Russians," Robert Hewson, editor of IHS Jane's Air-Launched Weapons, said to the Guardian.
Hewson's conclusion comes from the fact that these weapons systems are far more advanced than what Syria already has. Russian operators would need to be on the ground to oversee the weapons.
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My Comment: This is Russia's red - line on Syria .... if you bomb these missile systems Russia will retaliate. I guess this also explains why there is now a sizable Russian naval presence in the region .... Russia is expecting the situation to deteriorate even further.