Does '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.' exist in a separate context from 'The controller contacted another controller to announce that everything was fine.', without logical interdependence?
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 contacted another controller to announce that everything was fine.