The US Embassy in Moscow caught fire in 1977. Sensitive information was stolen by several firefighters who were also KGB agents.
During the Civil Rights Movement, the Soviet Union purposely inflamed racial tensions by mailing forged threats from the KKK to black neighborhoods.
In the mid-1980’s the Soviet KGB launched “Operation INFEKTION,” aimed at making people believe that the United States invented HIV.
In 1997, four years before being arrested for spying for the KGB, Robert Hanssen was caught using a password cracker on a federal computer. When asked about this, he said that he was simply trying to install a color printer, and so he needed the administrator password. They believed him.