CIA veteran Joseph Augustyn reviews James C. Lawler's book The Traitor’s Tale: A Novel of Treachery Within the CIA.

Former FBI agent Robert ... the spy within their ranks. In the weeks leading up to his arrest in February 2001, some 300 staff members were involved in the investigation and kept tabs on Hanssen ...

ALEXANDRIA, Virginia (CNN) -- Accused FBI spy Robert Hanssen pleaded not guilty Thursday to 21 charges of conspiracy and espionage, including 14 charges that could carry the death penalty.