As night fell, we touched the remains of houses that have not been repaired after the war, and few passers-by, a bleak atmosphere. When we entered the capital, we got more people and cars. The first thing we saw was the National Archives, which was renovated after the war. Go 300 meters, you will reach the Salajewo Museum, where the bridge is the detonation point of World War I. On June 28, 1914, the National Day of Serbia, the heir to the throne of Austria-Hungary, Archduke Ferdinand, was shot dead by the young Serbian Princip, a Bosnian student belonging to the Serbian "mafia". This incident made the Austro-Hungarian Empire declare war on Serbia in July, becoming the trigger for World War I. A very ordinary bridge actually witnessed important events in history.