The 70s were marked by the founding of the Dr. Pedro Albizu Campos Puerto Rican High School in 1972 and the Puerto Rican Cultural Center in 1973, the struggle of Puerto Ricans, in the diaspora and on the island, against sterilization, and police brutality, which sparked the 1977 Humboldt Park riot. It also saw the beginning of the anti-mining campaign in the US, the Madison Square Garden rally in support of Puerto Rican independence— over 20,000 participated— the release of the Puerto Rican Nationalists, the first Puerto Rican People’s Day Parade, as well as the construction of Roberto Clemente High School.