Philip H. Gordon: “To allow locals... to interfere with freedom of movement... would be a slippery slope that would be dangerous for the…”

Our core interests are better protected by working together than by seeking to respond to threats alone.

I don't think that's a habit the United States should want to develop.

If we're not satisfied after this back-and-forth... sanctions go back in place. That's new and different.

NATO is vital to U.S. security.