US Republican presidential hopeful John McCain (L) shakes hands with employees of a portuary society in Cartagena, department of Bolivar, 1090 km north of Bogota, Colombia, on July 2, 2008. McCain, who wrapped up an overnight stay in Colombia on the second day of a tour meant to burnish his foreign policy and national security credentials, is to travel to Mexico later in the day. AFP PHOTO/Mauricio Dueñas