Pakistan's military has begun its campaign against the Taliban in South Waziristan, long-promised after a series of deadly attacks by Taliban fighters across the country.<br /><br />About 150,000 people are thought to have fled South Waziristan ahead of the assault, only to find that no preparations have been made for civilians caught up in the conflict.<br /><br />Meanwhile, many analysts say the reasons behind Islamabad's domestic crisis lie north of the border in Afghanistan.<br /><br />Al Jazeera's Nicole Johnson reports on the Pakistani military's newest campaign against the Taliban.