A Chicago aviation security officer fired after forcibly removing a United Airlines passenger is suing the airline and his former employer, according to court documents. James Long filed a lawsuit Tuesday against the department, its commissioner, Ginger Evans, and United. On April 9, 2017, aviation security officers, including Long, were called to a United flight for a passenger who refused to give up his seat. The responding officers approached the passenger, Dr. David Dao, and tried to persuade him to leave calmly, after which Dao told them, “I’m not leaving this flight that I paid money for. I don’t care...