1954: Four Puerto Rican nationalists open fire from a visitors gallery in the House of Representatives chamber in the United State Capitol, injuring five representatives. The shooters, Lolita Lebrón, Rafael Cancel Miranda, Andres Figueroa Cordero and Irving Flores Rodríguez, wanted to highlight Puerto Rico's struggle for independence from U.S. rule. They were arrested, tried and convicted in federal court, and given long sentences, effectively life imprisonment. In 1978 and 1979, they were pardoned by President Jimmy Carter and all four returned to Puerto Rico. This photo shows Lebrón being escorted by police after the attack.