Heriberto Castro - Captain of the Utuado branch of the Cadets of the Republic. Rosa Collazo - Treasurer of the New York branch of the Nationalist Party. Melitón Muñiz Santos - President of the Peñuelas branch of the Nationalist Party and leader of the Peñuelas Incident. José Antonio Negrón - Leader of the Naranjito Incident. Carlos Vélez Rieckehoff - Leader of the Vieques branch of the Nationalist Party. Hugo Margenat - Founder of "Acción Juventud Independentista" (Pro-independence Youth Action) and the "Federación de Universitarios Pro Independencia" (University Pro-Independence Federation of Puerto Rico). Ruth Mary Reynolds - Founder of "Americans for Puerto Rico's Independence". Damián Torres - Led the Utuado Uprising with Heriberto Castro. Attempt against President Truman Oscar Collazo - President of the New York branch of the Nationalist Party. Griselio Torresola - Cousin of Blanca Canales who teamed up with Oscar Collazo in the assassination attempt. U.S. Capitol shooting incident Lolita Lebrón - Leader of the attack against the U.S. Capitol in 1954. Rafael Cancel Miranda - Participant in the attack against the U.S. Capitol in 1954 Irvin Flores - Participant in the attack against the U.S. Capitol in 1954 Andres Figueroa Cordero - Participant in the attack against the U.S. Capitol in 1954 Photo gallery Mundo Abierto (Open World) "Mundo Abierto " (Open World) is a poem written in 1956 by Hugo Margenat, in which he refers to the bombardment of the town of Jayuya by the U.S.-backed Puerto Rico National Guard. This occurred during the Jayuya Uprising, which was headed by Nationalist leader Blanca Canales. Incarcerated Nationalists FBI list of names of the Nationalists who were incarcerated in 1950 and who were still in prison as of 1954. See also List of Puerto Ricans List of revolutions and rebellions Puerto Rican Independence Movement Puerto Rican Nationalist Party References Further reading Nelson Antonio Denis, War Against All Puerto Ricans: Revolution and Terror in America’s Colony; Nation Books (April 7, 2015); . 20th century in Puerto Rico History of United States expansionism Protests in Puerto Rico Puerto Rican nationalists Political history of Puerto Rico Puerto Rican independence activists