KARACHI, Pakistan -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. The blast killed at least eight people and left a crater 10 feet (3 meters) deep, police said. The Pakistani Taliban claimed responsibility for the early morning attack in the southern port city of Karachi. The target of the bombing, Chaudhry Aslam, escaped unscathed and said he would not be cowed by the attack. "This is a cowardly act," Aslam told local television. "I'm not scared. I will not...