As many as 30,000 people were killed and "disappeared" during the seven-year period from 1976 to 1983, after a military junta overthrew then-President Isabel Perón and carried out a purge of leftists and political dissidents. During a visit to Buenos Aires in March, President Obama bemoaned the slowness of the U.S. to condemn the crackdown in Argentina. Leaders in Washington such as then-Secretary of State Henry Kissinger originally supported the junta's efforts and appeared to encourage it to act quickly so as not to suffer a blowback from Congress."The quicker you succeed the better," Kissinger told Argentina's foreign minister in 1976, shortly after the coup took place.