Putin says Russia will respond quickly if it believes Europe is provoking it

President Vladimir Putin said on Thursday that Russia will respond swiftly if it thinks Europe is provoking it and said that almost all of the U.S.-led NATO alliance was now fighting against Russia over Ukraine.

​ President Vladimir Putin said on Thursday that Russia will respond swiftly if it thinks Europe is provoking it and said that almost all of the U.S.-led NATO alliance was now fighting against Russia over Ukraine. Read More Breaking News, Latest News and Videos | CNN