investigators now looking at two nsc officials that came down with a mystery illness late last year right near the white house, no less. i've got two perfect guests to talk more about it. former cia officer mark -- who came down with a mystery symptom in moscow. and adam entiss, who has written about this. mark, how did it feel? >> this was one of the most terrifying experiences in my life. it was december of 2017. i woke up in the middle of the night in a moscow hotel room and i had an incredible case of vertigo. i couldn't stand up. i was falling over. i had a splitting headache and i had tinnitus ringing in my ears. i've spent a lot of time in war zones in iraq and afghanistan, but this was the most terrifying experience of my life. >> i know that now you're retired from the cia. are you retired on some form of disability? in other words, does the government recognize, formally recognize that you suffered an