Thailand’s prime minister attended the Asia-Pacific Economic Cooperation (APEC) summit in San Francisco this week. He’s been there in part to build interest in a mega-project: a shortcut, inspired by the Panama Canal, that would allow seafaring cargo to travel over a narrow Thai isthmus dividing the Pacific and Indian Oceans. Some call it a game changer, but skeptics tell The World’s Patrick Winn that it won’t fly.