A U.S. official said al-Yazid was believed to have died in a U.S. missile strike.A statement posted on an al-Qaida Website said al-Yazid, which it described as the organization's top commander in Afghanistan, was killed along with his wife, three daughters, a grandchild and other men, women and children but did not say how or where.The statement did not give an exact date for al-Yazid's death, but