The new secretary general of the Organization of American States resigned yesterday because of accusations that he took a bribe in 2001 while president of Costa Rica. In a letter to the 34-nation organization, Miguel Angel Rodriguez denied he did anything wrong. "With humility, pain and anguish, I ask you and your countries for forgiveness for making you endure this difficult period," Rodriguez said in his letter, which was read to OAS members here yesterday by Costa Rica's ambassador to the OAS, Luis Guardia. Rodriguez wrote that he was leaving because he did not want to expose the OAS to...