Associated Press
FILE - In this Feb. 18, 2015, courtroom file sketch, Abid Naseer, left, accused of being an al-Qaida operative, questions Najibulla Zazi, center right, a cooperating  government witness, as Assistant U.S. Attorney Zainab Ahmad, far right, observes Naseer, and Judge Raymond Dearie listens from the bench in federal court in the Brooklyn borough of New York, where Naseer is acting as as his own attorney. During closing arguments Monday, Feb. 23,  Nasser denied being part of a terror conspiracy to attack targets in America and Europe. In her closing argument, Ahmed told jurors that the arrests of Naseer and other members of a terror cell in Manchester, England in 2009 averted mass murder there. The government alleges Naseer had received bomb-making instruction in Pakistan in 2008.  (AP Photo/Elizabeth Williams, File)

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A Taliban suicide bomber detonated a vehicle packed with explosives Monday outside the home of a senior police officer tasked with cracking down on militants in Pakistan's largest city.

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