Mark Smith works for Pride Mobility, a motorized wheelchair company.
He also has cerebral palsy.
Smith boarded a flight from Los Angeles to Philadelphia on Monday night and says he was ordered off the plane.
That's when Smith had to rebook a later flight.
"I was in shock. I was confused and in disbelief, because I fly so often for business," he says.
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Smith claims American Airlines never explained why he was taken off the flight.
American Airlines issued a statement apologizing to Smith and has reached out to him regarding the incident.
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