Can you find the "secret word" hidden on my tie? Aldrich Ames was "the most damaging mole in the history of the Central Intelligence Agency," according to time.com. He worked on behalf of the Soviet and Russian KGB from 1985 until February 1994, while also leading the US counterintelligence team (supposedly spying on USSR and then Russia). Streetside mailboxes in Washington, DC like this one were frequently used to signal when information was ready to be dropped. Ames pleaded guilty to spy charges on April 28, 1994. He is serving a life sentence, currently at Terre Haute FCI.