difficult to pin down we are calculating. let me start with the americans who are in afghanistan and we believe want to leave. first, as i think all of you know, the us government does not track americans movements when they travel around the world. when americans visit a foreign country or if they reside there, we encourage them to enrol with the us embassy. whether you are not is up to them. is voluntary. and when americans leave a foreign country it is also up to them to d enrol. again, that is a choice of a not a requirement. securely given the security situation in afghanistan for many years, we have urged americans not to travel there, we repeatedly asked americans who are in afghanistan to enrol, and since march of this year, we have sent 19 separate messages to americans enrolled with the embassy in kabul, encouraging and then urging them to leave the country. we