 The partially-intact code identified it as a former aircraft of the 49th Operations Group.An F-117 was also photographed in 2019 carrying unit markings previously unassociated with the aircraft – a band on the tail bearing the name "Dark Knights", suggesting either an official or unofficial squadron is maintaining the Nighthawks.In July 2019, one Nighthawk was spotted flying above Death Valley, trailing behind a KC-135R Stratotanker in a hybrid aggressor scheme.