the deadly bombing yet another stark rereminder of the risk of the mission as it races to evacuate many of the 1,500 that remain in the country. the august 31st deadline to withdraw just days away. fearly 1,000 americans remain unaccounted for. general mckenzie telling reporters today that the united states is prepared for more attacks. and undeterred in its mission. the search is on for the perpetrators. >> we expect those attacks to continue, and we're doing everything we can to be prepared for those attacks. the plan is designed to operate while under stress and under attack, and we will continue to do that. we will coordinate carefully to make sure it's safe for american citizens to come to the airfield. if it's not, we'll tell them to hold and we'll work other ways to try to get them to the airfield. i think our mission remains. we're still committed. if we can find who is associated with this, we will go after them. we've been clear we will retain the right to operate against