KARACHI, PAKISTAN -- A suicide bomber blew up his sport-utility vehicle in the middle of a village volleyball game in northwestern Pakistan on Friday afternoon, killing 75 people and injuring more than 100 in a community that has repeatedly defied Taliban extremists. Police speculated that the horrific bombing in the village of Shah Hassan Khel, in the Lakki Marwat district, was an act of reprisal against area leaders who last year formed private militias to oppose the Taliban and recently turned in a group of extremist fighters to the authorities. The attack was the latest in a string of bombings...