Allen (2005). Leeway Divergence. Government Report prepared for the U.S. Department of Homeland Security. January 2005. CG-D-05-05. (Report). Archived from the original on May 20, 2011.
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Allen (2005). Leeway Divergence. Government Report prepared for the U.S. Department of Homeland Security. January 2005. CG-D-05-05. (Report). Archived from the original on May 20, 2011.