Robert Hanssen was indicted on 21 charges of conspiracy and espionage, and could face the death penalty.

CNN examines the National Security Agency, and finds out how spying has been changed by the progress of technology.

Offers news and analysis of the espionage case against FBI agent Robert Philip Hanssen. Includes legal documents, a glossary and video clips.

FBI agent Robert Philip Hanssen was charged with passing secrets to Russia during his 15 years as a spy.

U.S. officials have expelled over 50 Russian diplomats who were accused of contact with alleged spy Robert Hanssen.

Members of the FBI are trying to piece together the damage they think was done by alleged spy Robert Philip Hanssen.