minister saying these convoys of western arms that are coming into ukraine were legitimate targets, what he didn't say is whether they were legitimate targets in ukraine or outside. the point was, he was trying to threaten, suggest that it might do and therefore escalate the threat against nato. as we have seen through this conflict, the russians warning about nuclear use, chemicalweapons, biological, this is the latest stage of that. poland is front and centre of the ukrainian refugee crisis — with more than a million and a half people having crossed the borders since the start of the russian invasion. there's also the potential threat of russia using chemical weapons in ukraine — and we've already seen russian missile strikes on ukrainian targets just a few miles from the polish border. my colleague sophie raworth has been talking to president andrei duda, and she began by asking him if he was concerned about the potential use of chemical weapons. this is something the world has not seen on this scale since the second world war and if you are asking me whether putin can use chemical weapons i think that