WASHINGTON — How fares the multination cover-up of the richest rip-off in world history? Obstruction of justice has never had it so good. Last month, after some badgering in this space and elsewhere, the House International Relations Committee announced it would look into the $5 billion kickback scandal in the United Nations' six-year Iraqi oil-for-food program, the largest humanitarian aid effort ever undertaken. Our State Department, eager for U.N. help in Iraq, wants no revelations of U.N. ineptitude and corruption. It waltzed the committee staff around. Senate Foreign Relations, however, not wanting to be upstaged by its House counterpart, called...