The Bureau and the Mole The Unmasking of Robert Philip Hanssen, the Most Dangerous Double Agent in FBI History

In 1979, FBI Agent Robert Philip Hanssen began to sell some of America’s most closely guarded intelligence secrets to the Soviet Union. Over the next twenty-two years, the massive volume of information he divulged to the Russians from the FBI, CIA, NSA, and White House would compromise decades of espionage work and put the national security of the United States in immediate jeopardy. But during the mid-1990s, FBI Director Louis J. Freeh discovered that there was a mole within the Bureau, and he began to set the trap that would expose the traitor within its midst.