 A committed Marxist–Leninist, Ramírez Sánchez was one of the most notorious political terrorists of his era.When he joined the Popular Front for the Liberation of Palestine (PFLP) in 1970, recruiting officer Bassam Abu Sharif gave him the code name "Carlos" because of his South American roots.After several bungled bombings, Ramírez Sánchez led the 1975 raid on the Organization of the Petroleum Exporting Countries (OPEC) headquarters in Vienna, which killed three people.