August 05, 2005, 8:41 p.m. Benon Sevan's Finest Hour Late in the day, former Oil-for-Food chief demands the U.N. open its books. It's rich that the former head of the United Nations Oil-for-Food program, Benon Sevan, is now protesting the secrecy surrounding U.N. records that he himself set up as confidential. With Sevan a target of the U.N.-authorized probe into the Oil-for-Food scandal, Sevan's lawyer has just released letters accusing the U.N.-backed investigators of "systematically" depriving Sevan of access to U.N. documents and other information needed to defend himself. Instead, writes Sevan's lawyer, Eric Lewis, Sevan has been "barred access...