Following a string of bombings and assassinations, calls are growing in Karachi, Pakistan's largest and richest city, for better security.<br /><br />Local leaders say there is an international conspiracy to destabilise the city.<br /><br />Amid rising tensions, army patrols have joined a beleagured police force on the streets of the edgy city. <br /><br />Al Jazeera's Kamal Hyder reports.
