garbage. Charles Manson was an obsession within the group and Bernardine Dohrn claimed he truly understood the iniquity of white America, with the Manson family being praised for the murder of Sharon Tate; Dorn's cell subsequently made its salute a four-fingered gesture that represented the "fork" used to stab Tate. Practice Shortly after its formation as an independent group, Weatherman created a central committee, the Weather Bureau, which assigned its cadres to a series of collectives in major cities. These cities included New York, Boston, Seattle, Philadelphia, Cincinnati, Buffalo, and Chicago, the home of the SDS's head office. The collectives set up under the Weather Bureau drew their design from Che Guevara's foco theory, which focused on the building of small, semi-autonomous cells guided by a central leadership. To try to turn their members into hardened revolutionaries and to promote solidarity and cohesion, members of collectives engaged in intensive criticism sessions which attempted to reconcile their prior and current activities to Weathermen doctrine. These "criticism self-criticism" sessions (also called "CSC" or "Weatherfries") were the most distressing part of life in the collective. Derived from Maoist techniques, it was intended to root out racist, individualist and chauvinist tendencies within group members. At its most intense, members would be berated for up to a dozen or more hours non-stop about their flaws. It was intended to make group members believe that they were, deep down, white supremacists by subjecting them to constant criticism to break them down. The sessions were used to ridicule and bully those who didn't agree with the party line and force them into acceptance. However, the sessions were also almost entirely successful at purging potential informants from the Weathermen's ranks, making them crucial to the Weathermen's survival as an underground organization. The Weathermen were also determined to destroy "bourgeois individualism" amongst members that would potentially interfere with their commitment to both the Weathermen and the goal of revolution. Personal property was either renounced or given to the collective, with income being used to purchase the needs of the group and members enduring Spartan living conditions. Conventional comforts were forbidden and the leadership was exalted, giving them immense power over their subordinates (in some collectives the leadership could even dictate personal decisions such as where one went). Martial arts were practiced and occasional direct actions were engaged in. Critical of monogamy, they launched a "smash monogamy" campaign, in which