Here this is what the KGB can do for all those who think the ISI is better than them lol -
Robert Hanssen is a former FBI agent who spied for Soviet and Russian intelligence services against the United States for 22 years (1979 to 2001). During his espionage career Hanssen compromised scores of investigations and operations, including the surveillance of suspected mole Felix Bloch, and completed an eavesdropping tunnel directly under the Soviet Embassy decoding room. At one time, he even became responsible for apprehending himself, and he passed some of that off to Aldrich Ames (below). Worse, however, were his leaks to the USSR of every KGB agent contacting the FBI conveniently identifying detected double-agents and prospective defectors alike. The FBI was so flummoxed at finding Hanssen, they had to buy the information to put him away (most of which they already had). Cash and Hanssens carelessness eventually led to his capture, and in 2001 he pled guilty to 13 counts of espionage in the United States. He was then sentenced to life in prison, without the possibility of parole, and can be found in Americas Supermax prison, where he remains in his cell, alone, 23 hours a day. Many have described his activities as possibly the worst intelligence disaster in US history.
Aldrich Ames began working for the CIA during high school, and did so until he was discovered to be a Soviet double agent in 1994. He specialized in selling the identities of CIA agents, placed within the KGB, to the KGB. In true cloak-and-dagger fashion, Ames would mark a blue postal drop box with a piece of chalk whenever he needed to contact his KGB handlers. The damage he caused US intelligence efforts cant really be known, but conservative estimates indicate that he exposed over 100 agents, and was directly responsible for at least 10 deaths. A thorough accounting of his finances revealed that he and his wife made over $4.6 million over the course of their espionage career. Ames explained the full extent of his activities as part of a plea bargain to mitigate his wifes sentence (how gallant). As a result, Ames was sentenced to life in prison, while his wife received 63 months.