An interesting aspect of the Elkins Park, PA sighting (late on the
night of 19 July 52) was that the witness, AF Capt Joe David Scalpone,
was attached to the HQ of the MATS Air Photographic and Charting
Service, which at the time was located on North Broad St in
Philadelphia, not far from the sighting location.
APCS was a distant ancestor of today's National
Geospatial-Intelligence Agency, NGA.
It's conceivable that APCS was engaged in producing maps or charts of
sightings for AFOIN at the time. It would be a plausible theory, IMO.
Capt Scalpone had flown photo-reconnaissance versions of the P-38
Lightning from bases in the Mediterranean during WWII, under Col
Elliot Roosevelt. (Probably 90th Recon Wing):
It's always interesting to me to see the type of witnesses who
reported the cases that AFOIN took most seriously. Maybe Fournet knew
Note that on the first page of the Scalpone sighting report, someone
penciled in the calculation, based on Scalpone's angular rate
estimates, that the main object was maintaining a speed of only 60
mph, but the second one may have accelerated to 720 mph to catch up to
> The date was 19 July 52