Poland In The Crosshairs

Here

"Russia's Foreign Ministry issued a statement saying the U.S. missile shield plans are clearly aimed at weakening Russia.
The U.S. says the missile defense system is aimed at protecting the U.S. and Europe from future attacks from states like Iran."

I don't know which to believe, they both sound right to me. But when you have Russia as the only country really complaining, it makes me wonder what they are so nervous about.

UPDATE: The new Soviet Union Missile shield in Syria?