$ 0 0 ISIS executes 19 girls for refusing to have sex with fighters as UN envoy reveals how sex slaves are 'peddled like barrels of petrol'http://www.dailymail.co.uk/news/article-3186229/ISIS-executes-19-girls-refusing-sex-fighters-envoy-reveals-sex-slaves-peddled-like-barrels-petrol.html#ixzz4J6ID4GyK