Operation Cat Drop is the name given to the delivery, by the United Kingdom's Royal Air Force, of cats to a remote village in Sarawak, Borneo. The cats were delivered in crates, dropped by parachute, as part of a broader program of supplying cats to combat a plague of rats. Many accounts of the event are of uncertain veracity, however. It is sometimes claimed that the cat population had previously been reduced as an unintended consequence of spraying DDT for malaria control. This story, often with various elaborations, is often told as an illustration of the problems that may arise from well-intended interventions in the environment, or of unintended consequences more generally.