He paid for a ticket and did not want to give up his seat.
A private company that could not provide the service he paid for due to the company's conduct utilized law enforcement to break their contract with the paying customer.
I have ZERO sympathy for United and no one else should either.
“...I have ZERO sympathy for United and no one else should either.”
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Well, the plane could not take off under aviation regulations until they were down to the authorized number of passengers. I guess you have ZERO sympathy for the fellow passengers who would have been held up had not a volunteer stepped up finally?