President Bush pledged Sunday to find those responsible for grenade attack on a church in the Pakistani capital, Islamabad, which killed five people including two Americans. The wife and daughter of a U.S. diplomat were among more than 70 worshippers trapped in Islamabad's Protestant church when two unidentified men threw grenades inside the building and closed the door behind them. The church was crowded with Sunday morning worshippers. "Five worshippers died in the blast while 45 others have been injured," Islamabad police chief Nasir Durrani told reporters outside the church. The U.S. Embassy in Islamabad identified the Americans as Barbara...