Two of the most important cities in North America are so physically close they would touch were they not separated by a wall at the US-Mexico border. El Tercer Pais tells the story of Tijuana and San Diego for the first time, an unforgettable tale of war and peaceful cooperation, dependency and shared destiny, exploitation and amity. Most of all, it tells the stories of forward-thinking individuals on both sides of the border who have brought the cities together for their mutual benefit.