The Pakistani Army claimed an air strike conducted by its helicopters on an alleged militant camp in South Waziristan, alongside the Afghan border, killed 20 fighters Tuesday. However, some 600 tribesmen demonstrated against the strike, claiming the dead were all innocent workers who were cutting trees at the time of the raid. And independent sources say that most of the victims were Afghan refugees heading back to Afghanistan. Masroor Hussain reports from Islamabad.