20mi Wof Williston reported triangle delta observation — July 1960

On or during July 1960, at or near 20mi Wof Williston, North Dakota, United States, the source reports the following sequence: THERE WERE NO OTHER UNUSUAL ACTIVITIES OR CONDITIONS REPORTED BY THE OBSERVERS. NO KNOWN FLIGHTS OF INTERCEPTS BALLOONS WERE REPORTED. OBSERVED STATED OBJECTS COULD BE PLAINLY SEEN (NORMAL SIGHT CONDITIONS) The text in the document reads: CCFSA PP PIERCE DR RUPPELT TO SRICONE, TEX TO JONES FTD GP MINOT AFB NORTH DAKOTA TRIANGLE CAP SPRINGS EXT ARE COLD PJEDELSLAPP HIGH INTENSITY AT RAPIDAN, MONTANA PJEDOR/AIP TECH INSTALL CENTER, WITCUT PARTITION PJEXHAUSTS LEAF WASH DC PJEXHAUSTING/ASSOC AIR FORCE "ASS" DC 1. SHAPE WAS DIFFICULT TO ASCERTAIN BECAUSE OF SPEED AND MANEUVERABILITY OF THE FLYING OBJECTS.