SAN FRANCISCO (AP) - California's oldest death row inmate - a 75-year-old who is legally blind and nearly deaf - is asking the U.S. Supreme Court to do something it has never done before: block an execution because of the condemned man's advanced age and infirmity. Clarence Ray Allen's attorneys contend that executing a feeble old man amounts to cruel and unusual punishment banned by the U.S. Constitution. Allen is set to die by injection Tuesday for ordering three slayings while behind bars for another murder. He has been on death row for more than 23 years. Allen, who turns...