It has been five years since rioting left almost 200 people dead in the far western Chinese city of Urumqi, in the region of Xinjiang. Security has been tightened ahead of the anniversary and more than 400 people have been arrested. Al Jazeera's Adrian Brown reports from Urumqi. Subscribe to our channel http://bit.ly/AJSubscribe Follow us on Twitter https://twitter.com/AJEnglish Find us on Facebook https://www.facebook.com/aljazeera Check our website: http://www.aljazeera.com/
