That can’t be good.
Check this out:

Russia has threatened for years to deploy offensive missiles near its borders with NATO countries in response to U.S. missile defense plans, and on Monday it confirmed that it has now done so, but gave no details.

There was no immediate response from NATO, but Poland – potentially the most likely target – called the development “worrying,” while the State Department said the U.S. has “urged Moscow to take no steps to destabilize the region.”