Serbian people gathered in Novi Sad on November 1 to mourn the victims of the train station roof collapse disaster two years ago. The disaster sparked an anti-government movement and led to the ouster of the ruling party a week ago. In the second largest city in Serbia, a concrete roof collapsed at a renovated train station, killing 16 people, including a 6- and 10-year-old sister. More: VOAChinese.com.