Karachi, Pakistan's financial capital, is a city of 18 million people, where traditional ethnic tensions have always been high.<br /><br />But in recent weeks, those tensions have turned into armed clashes, with officials warning that the Taliban might use the city as a financial base to fund their activities.<br /><br />As Al Jazeera's Imran Khan reports, some residents say a political solution is the only way to halt the violence and unite the city.
