gravely concerned about the capital kabul. it is sending 3,000 additional troops to help evacuate most american civilians from the u.s. embassy. and hundreds of thousands of afghan s have fled their homes. almost 400,000 have been displaced inside the country just this year, others have fled the country. pakistan hosts almost 1.5 million while some 780,000 are living in iran. many of those recently up rooted have made their way to kabul in certainly of refuge, but with the latest advances, the capital may soon be no safe haven. michael holmes has more. >> reporter: families sleep on the hard ground outside this school in afghanistan, it may not look like the most comfortable place to rest, but at least for now, it is safe, away from the trail of violence left behind by the taliban's