LAHORE, Pakistan Feb 13, 2006 (AP)— Gunmen on a motorcycle Monday killed a Pakistani doctor who spent six months in jail on suspicions of harboring al-Qaida suspects and possessing illegal weapons. Some in this eastern city blamed the United States for the shooting of Ahmad Javed Khawaja, who had spent much of his life in the United States. A protest of about 500 people erupted shortly after the killing, with many shouting "Death to America!" as they blocked a street and set tires on fire. Khawaja, 72, was attacked while walking to his clinic after morning prayers at a mosque,...