Tens of thousands of Serbians gathered in central Belgrade on Sunday to protest against President Aleksandar Vučić and his ruling Serbian Progressive Party (SNS). The demonstrations come in the wake of a train station roof collapse in Novi Sad last month that left 15 people dead, an event protesters attribute to corruption and substandard construction tied to government negligence. The Novi Sad tragedy occurred on November 1 when the recently renovated roof of the train station collapsed,