arrived in the capital for talks on forming a new afghan government. thousands of people are still massed at the perimeter of the airport, anxious to board flights out of the country, and the crush of people in sweltering heat left some needing medical help from us troops. since the taliban took control of the country last weekend, they've set up checkpoints on the main road from kabul to the airport, making it difficult forforeigners, and those afghans who worked with us and nato forces, to leave. ourfirst report tonight is from our security correspondent, frank gardner, and a warning, you might find some of the images distressing. crowds, chaos, confusion. the scene at kabul airport grows ever more volatile as thousands of afghans clamour to leave the country. gunfire. taliban fighters are guarding the outside of the perimeter, but even some people with valid travel documents are not getting through. translation: we've got a legal visa.