"I reminded myself that once you start to defend someone, it's difficult to find a place to stop. But I went ahead and took that first step anyway. For President Teddy Roosevelt, controlling the east-west passage between two oceans mattered so much that he orchestrated a revolution to control it. His command was to 'let the dirt fly' and for years, the American Zone of the Panama Canal mesmerized the world, working in uneasy co-existence with the...