NOVI PAZAR, Serbia, Feb 5(Reuters) - When Merima Avdic crossed a bridge over the Danube River to reach the city of Novi Sad in November, a Serbian flag in her hand, fireworks lit the sky and tens of thousands of protesting students cheered to welcome her and her peers.
She had walkedmore than 400 km (249 miles) from the university of Novi Pazar in the Muslim-majority Sandzak region of southwest Serbia, to join one of the largest and longest protests in the country in decades, triggered by the collapse of a railway station roof a year earlier.
