On July 24, 1952, two Air Force colonels, flying a B-25, took off
from Hamilton Air Force Base, near San Francisco, for Colorado
Springs, Colorado. The day was clear, not a cloud in the sky.

The colonels had crossed the Sierra Nevada between Sacramento and
Reno and were flying east at 11,000 feet on "Green 3," the aerial
highway to Salt Lake City. At 3:40P.M. they were over the Carson Sink
area of Nevada, when one of the colonels noticed three objects ahead
of them and a little to their right. The objects looked like three F-
86's flying a tight V formation. If they were F-86's they should have
been lower, according to civil air regulations, but on a clear day
some pilots don't watch their altitude too closely.

In a matter of seconds the three aircraft were close enough to the B-
25 to be clearly seen. They were not F-86's. They were three bright
silver, delta wing craft with no tails and no pilot's canopies. The
only thing that broke the sharply defined, clean upper surface of the
triangular wing was a definite ridge that ran from the nose to the
tail.

In another second the three deltas made a slight left bank and shot
by the B-25 at terrific speed. The colonels estimated that the speed
was at least three times that of an F-86. They got a good look at the
three deltas as the unusual craft passed within 400 to 800 yards of
the B-25.

When they landed at Colorado Springs, the two colonels called the
intelligence people at Air Defense Command Headquarters to make a UFO
report. The suggestion was offered that they might have seen three F-