James Clapper: “Thank you for the invitation to offer the Intelligence Community's assessment of threats to U.S. national security.”

it's a question of time. It's not if, it's when we have some sort of confrontation that we're going to have to respond to, the NATO will have to respond to.

I think the tide is beginning to turn here in favor of the Ukrainians, and if they can sustain this, and that means, we in NATO, providing them the weapons they need, the supplies they need, et cetera because the Russians are going to run…

this is the standard Russian -- Soviet Russian way of war. Surround a city if they can and they are having trouble doing that, put it under siege, strangle it, prevent supplies, medicines, food, water, et cetera and then bombard the city…

I think it's very prudent.