President Jorge Pacheco declared a state of emergency in 1968, followed by a further suspension of civil liberties in 1972. In 1973, amid increasing economic and political turmoil, the armed forces, asked by the President Juan María Bordaberry, closed the Congress and established a civilian-military regime. The CIA-backed campaign of political repression and state terror involving intelligence operations and assassination of opponents was called Operation Condor. According to one source, around 200 Uruguayans are known to have been killed and disappeared, with hundreds more illegally detained and tortured during the 12-year civil-military rule of 1973 to 1985. Most were killed in Argentina and other neighboring countries, with 36 of them having been killed in Uruguay. According to Edy Kaufman (cited by David Altman), Uruguay at the time had the highest per capita number of political prisoners in the world. "Kaufman, who spoke at the U.S. Congressional Hearings of 1976 on behalf of Amnesty International, estimated that one in every five Uruguayans went into exile, one in fifty were detained, and one in five hundred went to prison (most of them tortured)."