A military spy plane of mysterious origin and purpose had been flying in circles over the Seattle area for almost two weeks.
Starting on Monday, July 24, the plane was flying daily missions, sometimes over 6 hours long, making tight circles over Seattle and the surrounding suburbs. It took a break on Saturday, July 29, and then continued daily flights until Thursday, Aug. 3.
It mostly used the Boeing Field airport in Seattle and the nearby Renton Municipal Airport.
CASA CN-235-300 airplane, callsign SPUD21, serial 96-6042, at Boeing Field airport, Seattle, Wash., on July 23, 2017. Woodys Aeroimages/CC BY-NC-ND 2.0
