A woman mourns the death of her family member shot dead in Karachi, Pakistan on Friday, July, 8, 2011. Security forces were ordered to shoot gunmen on sight Friday in Pakistan's largest city, after three days of violence that killed scores of people and prompted political leaders to call for a day of mourning that shut businesses and kept public traffic off the roads.This week's violent spate in Karachi was among the worst this year for a city that has long been a hotbed of ethnic, sectarian and political tensions. (AP Photo/Fareed Khan)

Associated Press
A woman mourns the death of her family member shot dead in Karachi, Pakistan on Friday, July, 8, 2011. Security forces were ordered to shoot gunmen on sight Friday in Pakistan's largest city, after three days of violence that killed scores of  people and prompted political leaders to call for a day of mourning that shut businesses and kept public traffic off the roads.This week's violent spate in Karachi was among the worst this year for a city that has long been a hotbed of ethnic, sectarian and political tensions.  (AP Photo/Fareed Khan)
A woman mourns the death of her family member shot dead in Karachi, Pakistan on Friday, July, 8, 2011. Security forces were ordered to shoot gunmen on sight Friday in Pakistan's largest city, after three days of violence that killed scores of people and prompted political leaders to call for a day of mourning that shut businesses and kept public traffic off the roads.This week's violent spate in Karachi was among the worst this year for a city that has long been a hotbed of ethnic, sectarian and political tensions. (AP Photo/Fareed Khan)
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