The terrorist attacks against the United States on 11 September 2001 exposed numerous flaws in data sharing among the country’s government agencies. The most serious weakness may have been the ineffective list of terrorist suspects who should have been denied entry to the US or the opportunity to fly on civilian airliners. Yet, the quadrupling of the list’s size between 2004 and 2007 has raised concerns that the process of compiling and managing the list is problematic. Full Story