As highlighted over on the backtrack site. It appears the NSA are one of the users of the excellent security testing Linux Distribution that is Back Track.
That is almost as cool as Nmap being used in the Matrix.
The National Security Agency and the Central Security Service tested the five U.S. service academies during the 2009 Cyber Defense Exercise.Teams were tested on their ability to defend computer networks the students designed themselves. The winner took home the coveted CDX trophy. In an unclassified movie produced by the NSA, we caught a glimpse of BackTrack being used in the CyberDefence 2009 Wargames.
http://www.backtrack-linux.org/backtrack/backtrack-used-by-the-nsa/
