Norma Arrostito left the communist party in 1967, and joined the organization "Comando Camilo Torres", where she met Mario Eduardo Firmenich, Carlos Ramus and Fernando Abal Medina. She fell in love with the latter, despite being seven years older than he was, and broke her relationship with Roitvan. They were trained in guerrilla warfare in Cuba during 1968, and back in Argentina they split from the "Comando Camilo Torres" to create a new cell. They were joined by Nélida Arrostito, a sister of Norma and her husband, Carlos Alberto Maguid. Her "nom de guerre" was "Gaby" (shortened form of the name "Gabriela") or "Gaviota" (seagull). The organization carried out in a series of operations against the security forces, which ended on 1 June 1970 in the kidnapping and murder of General Pedro Eugenio Aramburu, a former "de facto" President and one of the leaders of the Revolución Libertadora which overthrew Perón in 1955. Norma played a supporting role during the kidnapping and she wrote and sent "dispatches" to the media updating the process of "trial" and "execution" of Aramburu. This operation, code named "Pindapoy", marked the first public action of Montoneros. Argentina was then under military rule, but the return of Peron to power was a matter of time. The death of Aramburu prompted the fall of president Juan Carlos Onganía and triggered a huge manhunt of suspected terrorists. On 20 September, a police raid caught Ramus and Abal Medina in a restaurant in William Morris, a neighborhood in the western outskirts of Buenos Aires, killing both of them after a brief shootout. After Abal Medina's death, Arrostito was known inside the organisation as "la viuda" ("the widow").