"Over the years, there have been numerous reports of huge, black,
triangular objects, referred to as Big Black Deltas (BBDs), in the
night skies above the United States. Some accounts estimate their
size to be as much as 600 feet long by 300 feet wide, with a height
of 40 feet. A study by the National Institute of Discovery Science
(NIDS) hypothesizes that BBDs could be lighter-than-air, blimp-like
military vehicles. To prove their point about the possible origins
of BBDs, NIDS researchers plotted the sighting locations on maps of
the United States and superimposed the locations of certain
military facilities. They discovered a very strong correlation and
concluded that "the United States Air Force has been flying large
triangular or deltoid shaped aircraft between [its] bases."
