Christel Boom

Christel Boom was an East German intelligence agent who worked for the Stasi to infiltrate the Social Democratic Party of Germany (SPD), the ruling party of West Germany from 1965 to 1983. Alongside her husband, Günter Guillaume, she helped to orchestrate the infiltration of the West German Chancellor Willy Brandt's government. The pair passed NATO and SPD information to the Stasi between 1969 and 1974. Their exposure as spies in 1974, dubbed the Guillaume affair, was part of a chain of events which led to Brandt's resignation as Chancellor the same year.