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.

A veteran FBI agent was yesterday charged with spying for Russia for more than 15 years. Robert Hanssen is said to have betrayed at least three Russian double agents working for the West - leading ...

Former FBI agent Robert Hanssen, who had been sentenced to life ... Hanssen lived a quiet life in the suburbs with his wife Bonnie and six children. Bonnie would later tell journalists that ...