Nov. 13, 1952; Opheim, Montana. 2:20 a.m.  Witness:  radar
       tracking by USAF 779th AC&W station.  An unexplained track was
       followed for 1 hour, 28 minutes, at 158,000' altitude (30 miles)
       and a speed of 240 m.p.h.  Radar was FPS/3 (PPI).