This image or file is a work of a U.S. Air Force Airman or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image or file is in the public domain in the United States.
({{Information |Description = A page from a 1999 Air Force Manual showing the twin towers in a sniper crosshair. Suggests at least the artist thought this could happen... |Source = Page 49 from Air Force Manual 10-100: Airman's Manual, Aug 199)
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