Sold by IS in Raqa, Yazidi female fighters back for revenge

She was trafficked into Raqa as a sex slave by the Islamic State group but managed to escape.Now Yazidi fighter Heza is back to avenge the horrors she and thousands of others suffered."When I started fighting, I lifted some of the worries from my heart," she says, surrounded by fellow Yazidi militia women in Raqa's eastern Al-Meshleb district.