Considering the premise 'The controller checked his radio equipment and contacted another controller at 8:53, saying that we may have a hijack and that he could not find the aircraft.', is 'The controller was unhappy about the contact from the other controller.' a statement that stands on its own?
The controller checked his radio equipment and contacted another controller at 8:53, saying that we may have a hijack and that he could not find the aircraft.###The controller was unhappy about the contact from the other controller.