Several of the early rock festival organizers of the 1960s such as Chet Helms, Tom Rounds, Alex Cooley and Michael Lang helped create the blueprint for large-scale rock festivals in the United States, as well promoters such as Wally Hope in the United Kingdom. In various countries, the organizers of rock festivals have faced legal action from authorities, in part because such festivals have attracted large counterculture elements. In 1972, Mar Y Sol Pop Festival in Manatí, Puerto Rico attracted an estimated 30–35,000 people, and an arrest warrant was issued for promoter Alex Cooley, who avoided arrest by leaving the island before the festival was over. British Free Festival organizers Ubi Dwyer and Sid Rawle were imprisoned for attempting to promote a 1975 Windsor Festival. The British police would later outright attack free festival attendees at the 1985 Battle of the Beanfield.