who we can get to the airport and get them out as fast as possible. as many vulnerable afghans that we can also work towards getting. but we understand the challenges of time and space here. we are mindful of that. that's why we are trying to continue to keep up this capacity and even improve it if we can. >> you said you have to ability to get all americans out who want to leave, several thousand. do you have a percentage for how many americans, have more than half been removed? >> i can't give you that number because i don't think there is a perfect number that we know with certainty of all americans in afghanistan. there is no requirement -- you can't force an american, when they go to a foreign country, to tell you that they're there. we encourage them to do that. the state department has a