In Argentina, five former intelligence and military officials have gone on trial on charges of murdering 65 people. They are accused of kidnapping, torturing, and killing left-wing activists under the country's military rule between 1976 and 1983. <br/><br/>Human rights groups hope the trial will shed light on Operation Condor, a joint effort among South American military rulers aimed at suppressing opposition. All the five have denied the charges. <br/><br/>They include two former intelligence officers, Honorio Martinez Ruiz and Eduardo Ruffo, former Gen Eduardo Cabanillas, former Col Ruben Visuara, and former military intelligence agent Raul Guglielminetti. <br/><br/>The court officials said a sixth man, former Vice Cmdr Nestor Guillamondegui, has been excused from the trial on health grounds. They said his health would be monitored to determine if he could face trial at a later date. <br/>