In 1914, a sandwich shop waiter named Nedeljko Čabrinović threw a bomb that bounced off Archduke Franz Ferdinand's car—and missed. Six hours later, his fellow conspirator got a second chance only because the Archduke's driver took a wrong turn and stopped directly in front of a café where Gavrilo Princip was eating lunch. How a failed assassination, a hungry teenager, and one confused chauffeur accidentally triggered World War I.