we could be doing, whether it's like the berlin air lift bringing in supplies and weapons or designating western ukraine as a humanitarian assistance zone all the way from west of kyiv all the way down south to odesa which would require nato troops to enforce that, but there's very few russian troops there on the ground. also, for a no-fly zone over russia, ukraine, over that humanitarian assistance zone and other things we can do also but we need to take the strategic s initiative, make russia and putin react to us instead of the opposite. >> general pitard, general zwack, a pleasure to speak with both of you tonight. >> thank you, john. >> director of chernobyl nuclear plant claims russian soldiers could have been exposed to radiation near the plant and tanks kicked up thick dust. we're going to speak about this with a nuclear expert and get his take, next.