The second of two assassination attempts on US President Harry S. Truman occurred on November 1, 1950. It was carried out by two Puerto Rican pro-independence activists, Oscar Collazo and Griselio Torresola, while the President resided at the Blair House. Torresola mortally wounded White House Police officer Leslie Coffelt, who killed him in return fire. Secret Service agents also were involved and wounded Collazo. President Truman was not harmed.[2]