The content originally appeared on: CNN CNN - A woman dressed in black raises a framed portrait of her son, Siavash Mahmoudi, in the air as she paces the sidewalk in Iran's capital, Tehran. 'I am not scared of anyone. They told me to be silent. I will not be,' the woman seen in a viral social media video yells, her voice fraught with emotion. 'I will carry my son's picture everywhere. They killed him.' Mahmoudi's mother is among many […]