It has been widely claimed that the Soviet Union organised and financed western peace movements; for example, ex-KGB agent Sergei Tretyakov claimed that in the early 1980s the KGB wanted to prevent the United States from deploying nuclear missiles and that they used the Soviet Peace Committee to organize and finance peace demonstrations in western Europe. (Western intelligence agencies, however, have found no evidence of this.) Tretyakov made a further uncorroborated claim that "The KGB was responsible for creating the entire nuclear winter story to stop the Pershing II missiles," and that they fed misinformation to western peace groups and thereby influenced a key scientific paper on the topic by western scientists.