In 1970, Caroline Hunter and her co-worker, future husband Ken Williams, discovered the involvement of their employer, Polaroid, in the South African apartheid system as the producer of the passbook photos used to identify black individuals in South Africa. To pressure Polaroid to divest from South Africa, Hunter and Williams created the Polaroid Revolutionary Worker Movement (PRWM). Through the PRWM, Hunter and Williams organized a boycott against the corporation. Consequently, Polaroid banned all sales to the government, including the military and police, and promised to raise wages and increase job training at its distributors. The plan did not pacify the PRWM, however, and, in 1971, Hunter testified before the United Nations advocating a boycott of Polaroid products. Polaroid proceeded to fire both Hunter and Williams. As a result of protests, a community group in Boston donated $10,000 it received from Polaroid to South African liberation movements. In 1977, it became public Polaroid film was being sold by the distributor Frank and Hirsch to the South African government for use in the "passbook" in violation of Polaroid's policy. This ended Polaroid's relationship with its distributor and all direct sales to South Africa.