terry biggio, he's also back from iraq and he, too, has been promoted at the f.a.a.o his dream job, overseeing the busiest air traffic control center in the nation, atlanta. his office filled with remiepd mi minders 9/11 and a baseball bat from his brother, form eer housn astro, craig biggio. >> i knew when i was about 10 years olt what i wanted to be i wanted to be an air traffic controller and i have no regrets. as an athlete, it would have been cool. but there's nothing like working airplanes. you know? and there's nothing like being involved in our air traffic control system. it's the greatest in the world. >> reporter: are you glad you were would recollecting that morning? >> i was. we won ir another at points in has god put me here? in part for mef, i'd like to think that 9/11 is why i was here. >> reporter: the united airlines dispatcher ed ballinger left the airline after 44 years. he has thought about but has not talked to the relatives of those who have died on united flight 93. the flight he tried to warn to say he was sorry. 9/11 commission investigators

faa managers terry biggio and mike mccormick would take this day and ask what more they could do.iraq, the u.s. government would try to rebuild iraq's infrastructure, including its air traffic control system. mike mccormick volunteered and recruited others, including biggio, whose brother-in-law was fighting there for the u.s. >> i felt like i was on the sidelines. i felt i could do more. i've got all this experience. i was an faa academy instructor. they needed a training program for the iraqi controllers and that was something that i have done for my entire career, so i've done all of those things and i felt i could help. i signed up in a minute. >> reporter: biggio would help train air traffic controllers in iraq, spending nearly a year. mike mccormick stayed through four tours. >> i don't think anyone ever gets over it. september 11th is irrevocably intertwined into everything i am and everything i do today. so it's part of me. >> reporter: "the footnotes of 9/11" continues. up next -- the footnotes who can't forget that face. >> eight months after i retired, i started having