Informative commentary by NIST and Cryptome here: Attack September 11, 2001 from New York Police HelicopterVideo obtained by an FOIA request from a person to the National Institute of Standards and Technology (NIST.gov) who directed NIST to send it to Cryptome.org. NIST investigated the WTC tower collapses and collected large amounts of evidence from officials and individuals. While much of this evidence has been released to the public, more is still withheld.Excerpt of the March 3, 2011 NIST letter to the FOIA requester who used the mail address of Cryptome.Quote: These electronic files image were provided to NIST by the New York Police Department. The City of New York has provided NIST with the following notice:Please take notice that the City of New York (City) has asserted that the contents of the enclosed DVD-ROM is protected under tbe Copyright Act, 17 U.S.C. sections 101 et seq. Tbe City expressly reserves its rights in these materials, and requires that you obtain the City#39;s permission prior to any reproduction, modification, adaptation, recompilation, or other derivative use of each DVD-ROM or portion thereof, including any still image extracted or derived therefrom, and that the City#39;s permission be obtained prior to the commercial distribution of any video footage and of still or moving images extracted or derived therefrom in any medium, by sale, rental, lease, lending or other means. The City requires that the instant notice accompany any moving or still images that you disseminate for any reason, including dissemination that complies with the fair use authorized by section 107 of the Copyright Act, and requires that each recipient of these materials comply with the instant Notice. Moreover, the City requires that a summary statement of its copyright be embedded in any moving or still images extracted from the enclosed DVD-ROM that are broadcast in any medium for any purpose. This summary statement shall read as fo...