A Kurdish Peshmerga fighter walks in the tunnel once used by the Islamic State (IS) militants at the Bashiqa frontline northeast of Mosul in northern Iraq, Nov. 22, 2016. Supported by Kurdish Peshmerga fighters, Iraqi troops kicked off operations last month to take back Mosul. The military operations slowed down as the IS militants used the civilians as human shields. (Xinhua/Khalil Dawood)