Clusters of "unidentified drones" have been spotted flying over RAF facilities, including one that has been tipped as a site that could hold US-made nuclear weapons . The US Air Force ( USAF ) has confirmed that unmanned devices ranging in "size and configuration" have been tracked over three RAF bases in Suffolk and Norfolk. Several “small unmanned aerial systems” were spotted flying over RAF Lakenheith, RAF Middenhall, and RAF Feltwell between November 20 and 22. As well as housing British