FBI analysis of the travel history of the founders and initial followers of the organization emphasized contacts with foreign governments, particularly the Cuban and North Vietnamese and their influence on the ideology of the organization. Participation in the Venceremos Brigade, a program which involved US students volunteering to work in the sugar harvest in Cuba, is highlighted as a common factor in the background of the founders of the Weather Underground, with China a secondary influence.[35] This experience was cited by both Kathy Boudin and Bernardine Dohrn as a major influence on their political development.[36]