and seeing president biden here in warshaw giving a key speech in the country that was behind the ironity in the face of kremlin aggression. in one of its largest military exercises in recent years, nato has been simulating its response to an attack on a member state. it's been taking place in norway, which shares a border with russia and was planned before the invasion of ukraine. but as our defence correspondent jonathan beale reports, the war has given the training a sharper focus. gunfire. another neighbour of russia has been invaded. this is northern norway, but it is just an exercise — a test for nato allies to come to its defence. something nato says it will do to protect a member state, though not for ukraine. but what's happened in ukraine has suddenly made this training feel more real. an exercise like this, it's really good to have, uh, to prove to countries like russia and other foreign states that you don't want to mess with nato. i think there have been some discussions about if the co—response should take place, but i think it's more important to do it now than ever. and

now the humanitarian crisis is taking toll on major cities like warshaw: as more try to escape.ishah hasnie is live and has the latest there. >> at evening to you, 24 hours after the president visited poland ukrainian refugees are pleading with nato leaders to give them less words and more action. they are very worried about their family members, loved ones back in eastern ukraine. the civil military administration says food reserves in eastern ukraine are gone because russian troops bombed their food storages. emotions have been running high today on the heels of the president in the attack of lviv this morning there was a big rally where protesters were chanting close the sky at a separate rally we sell russian nationals did not seem prudent in the war. the president's comments about putin may be resonating with ukrainian refugees but they still want concrete plans to in this war. >> from u.s. important decisions in the airspace. they bombed this. >> right now the flow of refugees has slowed down the last couple of days. we notice that at the train stations near the border tow