Of all the many shifts and twists in U.S. society since the twin towers fell 20 years ago, none may be quite as profound as in the aviation industry.
Now 35 years into his career, Central Illinois Regional Airport Director Carl Olson was an airport director on 9/11 as well, in upstate New York. Olson said his wife called and told him an airplane had collided with a World Trade Center tower.
He thought it was possible but not likely considering a plane that hit the Empire State Building decades earlier and headed for a TV just in time to see the second jet slam into the other tower.
“We took a breath, looked at each other and got to work. We scattered and started managing emergency…