Nigeria's president Goodluck Jonathan, center right, fields questions from journalists as he leaves U.N. headquarters, where a day earlier a suicide bomber crashed through an exit gate and detonated a car full of explosives, in Abuja, Nigeria Saturday, Aug. 27, 2011. Jonathan vowed Saturday to bring terrorism "under control" as he visited the bombed headquarters of the United Nations in his country, a day after at least 19 people died in an attack claimed by a radical Muslim sect. (AP Photo/Rebecca Blackwell)