The US Air Force's top-secret RAT55 jet was spotted soaring over Area 51 in Nevada, confirming rumors that this enigmatic radar plane operates from the clandestine Groom Lake facility. Aviation ...

73-1155 is colloquially known as RAT or RATT 55 after its commonly used callsign, which reportedly stems from the term Radar Airborne Testbed as well as the aircraft’s serial number. On this sortie, ...