  thumb|memorial plate at the place of the assassination of admiral luis carrero blanco. operaciÃ³n ogro (operation ogre) was the name given by the basque liberation group eta (euskadi ta askatasuna) to its assassination of admiral luis carrero blanco, the prime minister of spain, on 20 december 1973. blanco's bodyguard and driver were also killed in the operation. an eta commando unit using the code name txikia (after the nom de guerre of eta activist eustakio mendizabal killed by guardia civil in april 1973) rented a basement flat at calle claudio coello 104, madrid, on the route that blanco would go to mass at san francisco de borja church. over five months, the unit dug a tunnel under the street - telling the landlord that they were student sculptors to hide their true purpose. the tunnel was packed with 80&nbsp;kg of explosives that had been stolen from a government depot. on 20 december, a three-man eta commando unit disguised as electricians detonated the explosives by command wire as blanco's dodge dart passed. the blast sent blanco and his car  into the air and over a five-storey building. the car crashed to the ground on the opposite side of a jesuit college, landing on the second-floor balcony. blanco survived the blast but died shortly afterwards. his bodyguard and driver were killed outright. the "electricians" shouted to stunned passers-by that there had been a gas explosion, and then fled in the confusion. eta claimed responsibility on 22 january 1974. in a collective interview justifying the attack, the eta bombers said: {{quote| the execution in itself had an order and some clear objectives. from the beginning of 1951 carrero blanco practically occupied the government headquarters in the regime. carrero blanco symbolized better than anyone else the figure of "pure francoism" and without totally linking himself to any of the francoist tendencies, he covertly attempted to push opus dei into power. a man without scruples conscientiously mounted his own state within the state: he created a network of informers within the ministries, in the army, in the falange, and also in opus dei. his police managed to put themselves into all the francoist apparatus. thus he made himself the key element of the system and a fundamental piece of the oligarchy's political game. on the other hand, he came to be irreplaceable for his experience and capacity to manoeuvre and becau
1973_in_Spain Assassinations_in_Spain ETA_actions Francoist_Spain History_of_Madrid Murder_in_1973 Terrorism_in_Spain