As the military prepares to move in on the Taliban heartland in South Waziristan, it has been confronted by a series of bold attacks claimed by the group.<br /><br />Four deadly assaults in just eight days have exposed Pakistan's increasingly fragile security situation. <br /><br />As Al Jazeera's Kamal Hyder reports from Rowalpindi in Pakistan, the increased violence is raising questions about the country's ability to confront the threat within its own borders.
