Presidential elections in 1977 were too important to pass up, however. The atmosphere was too volatile to allow another run by Duarte, so UNO nominated retired Colonel Ernesto Claramount Rozeville to head its ticket. He was opposed by the official PCN candidate, General Carlos Humberto Romero Mena. Once again, electoral fraud was clumsy and poorly disguised. Claramount, his running mate Jose Antonio Morales Ehrlich, and a crowd of thousands gathered in the Plaza Libertad in San Salvador to protest Romero's election. Their assembly was the occasion for the February 1977 attack that left as many as fifty protesters dead. As he was taken from the scene in a Red Cross ambulance, Claramount declared, "This is not the end. It is only the beginning."