CNN The Situation Room May 3, 2013 21:53:00
>> reporter: there are many watch lists in government agencies, from the border patrol to the fbi to the cia. and the names of both the older tsarnaev brother and his mother were on one called the terrorist identity's data mar environment, or tide. a low-level list of about 700,000 names. something akin to a first line of defense. there is no active surveillance of people on tide. their names are kept in case they show up in connection with more serious threats. then they may be bumped to the no-fly or select list where their movements would be scrutinized much more closely just in case an att...
Source: archive.org