Associated Press
FILE - In this file photo taken Dec. 10, 2014, Afghanistan's President Ashraf Ghani speaks during a news conference at the presidential palace in Kabul, Afghanistan. There is cause for measured optimism - a new president has vowed to overhaul the government, root out corruption and mend ties with neighboring Pakistan, where the Taliban is long believed to have enjoyed safe haven. But President Ashraf Ghani faces a monumental challenge in trying to reform the notoriously corrupt government and security forces, and the Taliban have vowed to keep fighting until the last foreign soldier departs. (AP Photo/Massoud Hossaini, 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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