The time that the NASA DC-8 spent up in the Pacific Northwest was a ton of fun for the aviation enthusiasts.  Since I did get to shoot the jet a few times, I got some closer shots of the airframe to show the various sensors that cover the jet and are used for the sampling work that has been its specialization.  There are plenty of them on the top, sides and bottom of the airframe.  Here are some shots.  I wonder what will replace the jet and whether it will have a similar array of probes?