In this Article, Sales discusses information walls in federal statutes such as the USA PATRIOT Act that prevent sharing between agencies and federal/state law enforcement.  Sales identifies the costs and benefits of information sharing, acknowledging the potentially high costs of mishandling sensitive information.  He then points out the statutory restrictions that prevent information sharing and the policy reasons behind these restrictions.  Sales ends by attempting to merge the two and describe how the benefits of information sharing can be realized while upholding the policy reasons to protect sensitive information.