Former Air Force One pilot Col. Mark Tillman, who was on the job during the Sept. 11, 2001, terrorist attacks, gave a riveting presentation at the EAA Aviation Museum on the 18th anniversary of 9/11 concerning his years in the left seat of Air Force One during the President George W. Bush administration, as well as a behind-the-scenes look at his day on 9/11 keeping the president safe and secure in the skies.