Afghan security force members take part in a military operation against Islamic State (IS) in Achin district of eastern Nangarhar province, Afghanistan, Sept. 16, 2019. (Photos: Saifurahman Safi/Xinhua)

Afghan security force members take part in a military operation against Islamic State (IS) in Achin district of eastern Nangarhar province, Afghanistan, Sept. 16, 2019.

Afghan security force members take part in a military operation against Islamic State (IS) in Achin district of eastern Nangarhar province, Afghanistan, Sept. 16, 2019.

Photo taken on Sept. 16, 2019 shows smoke rising from an ammunition depot during a military operation against Islamic State (IS) in Achin district of eastern Nangarhar province, Afghanistan.