On May 1, some twenty thousands people took to Milan's streets to protest Expo 2015. Known as the Universal Exhibition, the event is dedicated to food, technology, and innovation. But activists have been longtime critics of the event; on behalf of the traditional May Day Parade, some 300 of them triggered a violent urban guerrilla, setting cars on fire, devastating banks and stores, and engaging the riot police.

Emanuele Cremaschi