the u.s. has credible intelligence that isis has both the capability and planning to carry out such attacks. this according to a u.s. defense official i have spoken to. security concerns around the airport are one of the major reasons president biden cited for sticking to his august 31st deadline for the withdrawal of all u.s. forces. the white house just announced that about 19,000 people were evacuated in the past 24 hours, people like those you're seeing there. more than 82,000 people in total have been airlifted over the course of the last 11 days. we're expecting a live update from that pentagon podium this hour. we'll bring it to you live. we're covering all the fast-moving developments out of afghanistan. let's begin with cnn's nick paton walsh who is in qatar where many of these evactuation are going.