On June 28, 1914, Serbian nationalist Gavrilo Princip fired the shot that killed Archduke Franz Ferdinand, the heir to the Austro-Hungarian throne. That assassination led to the outbreak of the First World War. Even today, many in Serbia and Serbian areas of Bosnia still regard Princip as a national hero. With the 100th anniversary of the assassination approaching, several memorials to Princip have been erected in Sarajevo. We pay a visit to Belgrade and the Bosnian capital of Sarajevo to examine the controversy that still surrounds the fateful assassination.