the pacifist and immediate-withdrawal wing of the former Socialist Party formed the Socialist Party USA (SPUSA). Bayard Rustin was the national chairperson of SDUSA during the 1970s. SDUSA sponsored a biannual conference that featured discussions, for which SDUSA invited outside academic, political and labor union leaders. These meetings also functioned as reunions for political activists and intellectuals, some of whom worked together for decades. The Weather Underground Organization, commonly known as the Weather Underground, was an American radical left organization founded on the Ann Arbor campus of the University of Michigan. Weatherman organized in 1969 as a faction of Students for a Democratic Society (SDS) composed for the most part of the national office leadership of SDS and their supporters. With revolutionary positions characterized by Black Power and opposition to the Vietnam War, the group conducted a campaign of bombings through the mid-1970s and took part in actions such as the jailbreak of Timothy Leary. The "Days of Rage," their first public demonstration on October 8, 1969, was a riot in Chicago timed to coincide with the trial of the Chicago Seven. The United Federated Forces of the Symbionese Liberation Army was an American self-styled left-wing revolutionary group active between 1973 and 1975 that considered itself a vanguard army. The Black Liberation Army (BLA) was an underground, black nationalist militant organization that operated in the United States from 1970 to 1981. The Communist Workers' Party was a Maoist group in the United States which had its origin in 1973 as the Asian Study Group (renamed the Workers' Viewpoint Organization in 1976) established by Jerry Tung, a former member of the PLP who had grown disenchanted with the group and disagreed with changes taking place in the party line. The party is mainly remembered as one of the victims of the Greensboro Massacre of 1979 in which five protest marchers were shot and killed by members of the Ku Klux Klan and the American Nazi Party at a rally organized by the Communist Worker's Party intended to demonstrate radical, even violent, opposition to the Klan. The "Death to the Klan March" and protest was the culmination of attempts by the Communist Workers' Party to organize mostly black industrial workers in the area. The Communist Party (Marxist–Leninist)'s predecessor organization, the October League (Marxist–Leninist), was founded in 1971 by several local groups, many of which had grown out of the radical student organization