„Federal agencies, including the National Security Agency, the F.B.I. and the Department of Homeland Security, monitor suspected terror sites on the Internet and sometimes track users. Private groups like Ms. Katz‘s Search for International Terrorist Entities Institute and The Middle East Media Research Institute are also keeping track of the ever-changing content of these sites. Ms. Katz‘s institute, which relies on government contracts and corporate clients, may be the most influential of those groups, and she is among the most controversial of the cyberspace monitors.