The name of one of the Boston Marathon bombing suspects, Tamerlan Tsarnaev, was listed on the U.S. government's highly classified central database of people it views as potential terrorists. But the list is so vast that this did not mean authorities automatically kept close tabs on him, sources close to the bombing investigation said on Tuesday.
The sources said Tamerlan Tsarnaev's details were entered into TIDE, a database maintained by the National Counterterrorism Center, because the FBI spoke to him in 2011 while investigating a Russian tip-off that he had become a follower of radical Islamists.
The FBI found nothing to suggest he was an active threat, but all the same placed his name on the "Terrorist Identities Datamart Environment" list. The FBI has not said what it did find about Tsarnaev.
read more @: http://www.reuters.com/article/2013/...93N06720130424
This is why its impossible to win a "war on terror".