and putin's nuclear threat. how concerned should americans be about the prospect of nuclear war? >> scott, we've heard a lot of irresponsible rhetoric coming out of vladimir putin, but we're focussed on making sure that we're all acting responsibly, especially when it comes to this kind of loose rhetoric. we've been very clear with the russians publicly and as well as privately, to stop the loose talk about nuclear weapons. >> privately, the united states has been in communication with the kremlin about these threats of nuclear war. >> yes. it's very important that moscow hear from us and know from us that the consequences would be horrific and we'd made that very clear. >> you called the nuclear talk loose talk. but isn't vladimir putin telling us what he's going to do if he is backed any further into a corner? >> vladimir putin has a clear way out of the war he started, and that's to end it. if russia stops fighting, the war ends. if ukraine stops fighting, ukraine ends. >> is there...