renounce revolutionary violence for "to leave people unprepared to fight the state is to seriously mislead them about the inevitable nature of what lies ahead". However, the decision to build only an underground group caused the Weather Underground to lose sight of its commitment to mass struggle and made future alliances with the mass movement difficult and tenuous. By 1974, Weather had recognized this shortcoming and in Prairie Fire detailed a different strategy for the 1970s which demanded both mass and clandestine organizations. The role of the clandestine organization would be to build the "consciousness of action" and prepare the way for the development of a people's militia. Concurrently, the role of the mass movement (i.e., above-ground Prairie Fire collective) would include support for, and encouragement of, armed action. Such an alliance would, according to Weather, "help create the 'sea' for the guerrillas to swim in". According to Bill Ayers, writing in 2001, by the late 1970s, the Weatherman group had further split into two factions—the May 19th Communist Organization and the Prairie Fire Collective—with Bernardine Dohrn and Bill Ayers in the latter. The Prairie Fire Collective favored coming out of hiding and establishing an above-ground revolutionary mass movement. With most WUO members facing the limited criminal charges (most charges had been dropped by the government in 1973) against them creating an above ground organization was more feasible. The May 19 Communist Organization continued in hiding as the clandestine organization. A decisive factor in Dohrn's coming out of hiding were her concerns about her children. The Prairie Fire Collective faction started to surrender to the authorities from the late 1970s to the early 1980s. The remaining Weather Underground members continued to attack U.S. institutions. COINTELPRO Event In April 1971, the "Citizens' Commission to Investigate the FBI" broke into an FBI office in Media, Pennsylvania. The group stole files with several hundred pages. The files detailed the targeting of civil rights leaders, labor rights organizations, and left wing groups in general, and included documentation of acts of intimidation and disinformation by the FBI, and attempts to erode public support for those popular movements. By the end of April, the FBI offices were to terminate all files dealing with leftist groups. The files were a part of an FBI program called COINTELPRO. After COINTELPRO was dissolved in 1971 by J. Edgar Hoover, the FBI continued its counterintelligence on groups like the Weather