Thomas Jefferson's thought process - revealed.
http://news.blogs.cnn.com/2010/07/02/analysis-confirms-subjects-citizens-change-in-declaration/ (http://news.blogs.cnn.com/2010/07/02/analysis-confirms-subjects-citizens-change-in-declaration/)
Okay, seriously .. with tongue seriously implanted ...
A mobile historical document scanning force. Fly, park- place documents on the ground under the aircraft.
http://www.abc.net.au/news/stories/2010/07/04/2944253.htm (http://www.abc.net.au/news/stories/2010/07/04/2944253.htm)
..and of course they didn't have a prior pass/scan to reference the change. ;)