Warning: This story contains graphic descriptions of violence and gunshot injuries . A crowd runs in panic along a dusty street. Shots ring out. A woman wearing a purple jacket carrying a stick falls to the ground. Another woman can be heard pleading, "Mama, mama, stand," as she tries to lift her. Blood is spreading around her stomach as another stain appears on her back. This verified footage, filmed in Tanzania's city of Arusha, is just one of many graphic scenes to have emerged showing the