In a case that critics say demonstrates a U.S. double standard on terrorism, a federal judge has dismissed all charges against Luis Posada Carriles, a former CIA operative who has been accused of masterminding a 1976 bombing of a Cuban civilian airplane that killed 73 people and a series of 1997 bombings in Havana. Posada, 79, is expected to return soon to his home in Miami as a hero of that city's anti-Castro right wing, despite U.S. government documents made public recently that have tied him to terrorist acts. [In 1959, Posada] began a long association with the CIA, receiving training in sabotage and explosives at the U.S. School of the Americas for the 1961 invasion of Cuba at the Bay of Pigs. He also was involved in a 1965 attempt to overthrow the Guatemalan government. On Oct. 6, 1976, a Cubana jet was blown up in midair after leaving Barbados for Havana. CIA documents released in 2005 indicate that the agency had prior knowledge of the plot, and a recently declassified FBI document placed Posada at two meetings where the bombing was planned. The CIA taught us everything," Posada said in a 1998 interview with the New York Times. "They taught us explosives, how to kill, bomb, trained us in acts of sabotage." In 1997, Posada was linked to a series of bombings of hotels, restaurants and night clubs in Havana. In August 2003 ... the Miami bureau of the FBI made the unexpected decision to close its terrorism case on Posada. Subsequently, according to FBI officials, five boxes of evidence were removed from the bureau's evidence room and destroyed.