// try to access the flight-plan of the aircraft. There are several layers
// of potential NULL-ness here, so we have to be defensive at each stage.
std::string originICAO, destinationICAO;
// try to access the flight-plan of the aircraft. There are several layers
// of potential NULL-ness here, so we have to be defensive at each stage.
std::string originICAO, destinationICAO;