Olusegun Obasanjo

Forget Austin Powers. The real "international man of mystery" is President Umaru Yar'Adua of Nigeria, who hasn't been seen in public for weeks. The absence comes at a tricky time for U.S.-Nigerian relations, as a Nigerian has been charged with trying to blow up a U.S. airliner and Obama needs Nigeria's help to counter Al-Qaeda's growing influence in the region.