In relation to 'At 8:51, the controller noticed the transponder change from United 175 and tried to contact the aircraft.', does 'The transponder code changed and the controller was eventually able to contact them.' represent a neutral and unrelated viewpoint?
At 8:51, the controller noticed the transponder change from United 175 and tried to contact the aircraft.###The transponder code changed and the controller was eventually able to contact them.