Lebanon conjures a maelstrom of images. Bombs, beaches, chaos, casinos, sophistication, barbarity, decadence, disaster and fortitude. This tiny nation has been known as the Switzerland of the Arab World, the Paris of the Middle East and as the site of the deadliest attack on U.S. Marines since World War II. But after years of war and instability, Beirut is experiencing a new era of optimism. Today, its skyline blends buildings still riddled with bullet holes from the Civil War (which lasted from...