After the dictatorships fell in 1983, Argentina convicted five junta leaders of murder, torture and other crimes.
Five top junta leaders, including two former presidents, have been convicted of crimes related to the "dirty war."
"My meeting here could not have been more negative," Mr. Richardson said after a meeting with junta leaders.
Along with other junta leaders, he was then put on trial for treason and rebellion.
Senior Administration officials said the agreement applied to two of the three junta leaders.
Senior junta leaders were tried and briefly jailed in the 1980's, but were freed under military pressure.
Burma's new civilian government is made up of former military junta leaders whose apparent decision to open up the country has surprised everybody.
They have not invited the military, on the grounds that there is only one subject to discuss with the junta leaders: their date of departure.
Because of his reputation as a soldier, many people supported him to be the junta leader: he is still popular with the people.
Their forces stormed Khanh's office and captured his duty officers but could not find the junta leader.