Every 2 June, at exactly noon, the civil defence systems all over Bulgaria are switched on. The sirens wail for a minute. A minute when many people stop whatever they are doing and stand still.
The sirens are the noisiest part of the commemorative events for the death of Hristo Botev (1848-1876), arguably the greatest poet Bulgaria ever produced. He died, along with many of his fellow revolutionaries, in a battle with the Ottoman forces, while trying to start an uprising in Bulgaria's northwest.