From 1976 onwards, the Chilean DINA and its Argentine counterpart, SIDE, were the operation's front-line troops. The infamous "death flights," theorized in Argentina by Luis María Mendía — and previously used during the Algerian War (1954–62) by French forces;— were widely used. Government forces took victims by plane or helicopter out to sea, dropping them to their deaths in planned disappearances. It was said that from this military bombardment that OPR-33 infrastructure located in Argentina was destroyed. In May 1976, members of Plan Condor met in Santiago, Chile, at which the participating countries discussed "long-range cooperation... went well beyond information exchange" and were given code names. In July, the CIA gathered intelligence that members of Plan Condor had the intention of striking "against leaders of indigenous terrorist groups residing abroad."