G. W. Schultz writes:
The Department of Homeland Security has acknowledged the existence of three more intelligence analysis systems that appear to include information about the American people, according to documents obtained by the Center for Investigative Reporting.
Turned over in response to a Freedom of Information Act request first made in December of 2008, the documents describe three noteworthy programs called Pantheon, Pathfinder and Organizational Shared Space, which among other things enable authorities to examine message traffic from the intelligence community using computers and a variety of software tools.
Read more on Center for Investigative Reporting.
Related:
2008 Privacy Impact Assessment – Pathfinder
2007 Privacy Impact Assessment – Pantheon