he went to trinidad and london, by june 2001, afghanistan. on 9/11, his mother, who doesn't want to be named, says he called home for the last time. >> he called me and he said, did you hear what happened? they said they're putting it on the muslims. i said to him, do not come because all the muslims -- and he was arguing with me, no, i didn't do nothing. i will come. >> reporter: and after that? >> after that, i didn't hear about him. >> reporter: his mother adamantly denies her son is directing al qaeda attacks. but when i asked about the admitted times square car bomber, she said this -- >> sometimes you have to do something very alarming for the people to wake up. it's not because you hate them