"Former FBI agent Robert Hanssen is serving a life sentence without the possibility of parole for his role in spying for the Soviet Union and Russia. Hanssen, a 25-year FBI veteran, was the bureau's liaison to the State Department Office of Foreign Missions and was <a href=""http://www.cnn.com/2002/LAW/05/10/hanssen.sentenced/index.html?_s=PM:LAW"" target=""_blank"">primarily responsible for keeping track of intelligence agents </a>assigned to work in the United States ""under diplomatic auspices."""