NASA - National Aeronautics and Space Administration

A Tupolev-154M belonging to the Russian Republic in the background, with the nose of our Falcon at left foreground.  LaRC's Dean Riddick is near center.  The Russian aircraft's markings identify it as an "Open Skies" treaty monitoring aircraft.  Details of this fascinating but little-discussed international program can be found at https://en.wikipedia.org/wiki/Treaty_on_Open_Skies.