Leadership comes in many forms and with many levels of risk, but history gives us a few moments when leaders stood alone and were proven right. [...] In late June 1948 the Soviets cut all road, rail and water access to Berlin, a city controlled by the Western Allies yet surrounded by Soviet-controlled territories. The Soviet’s goal: take Berlin from the Allies by forcing the US-UK-French alliance into one of two options: try to protect a city of 2.1 million starving Germans, or war. The Soviets expected the West to surrender the city quickly. [...] The US was in the...