An interrogator accidentally stepped on a prisoner's Koran, copies of Islam's holy text got wet when guards tossed water balloons into a cellblock and one was "splashed" by urine, according to the final results of a Pentagon probe. But the investigation sparked by accusations in the press about desecration of the Koran here found "no credible evidence" that prison guards or interrogators "ever flushed a Koran down a toilet," the U.S. Southern Command, which oversees the prison for terrorism suspects, said yesterday. The findings show that al Qaeda and Taliban detainees at the detention center themselves mishandled Korans on 15...