Pakistani protesters burn tires to block the main highway in Rawalpindi, Pakistan on Friday, Sept. 21, 2012. Pakistan has blocked cell phone service in major cities to prevent militants from using phones to detonate bombs during a national day of protest against an anti-Islam film produced in the United States. (AP Photo/B.K. Bangash)

Associated Press
Pakistani protesters burn tires to block the main highway in Rawalpindi, Pakistan on Friday, Sept. 21, 2012. Pakistan has blocked cell phone service in major cities to prevent militants from using phones to detonate bombs during a national day of protest against an anti-Islam film produced in the United States. (AP Photo/B.K. Bangash)
Pakistani protesters burn tires to block the main highway in Rawalpindi, Pakistan on Friday, Sept. 21, 2012. Pakistan has blocked cell phone service in major cities to prevent militants from using phones to detonate bombs during a national day of protest against an anti-Islam film produced in the United States. (AP Photo/B.K. Bangash)
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