Migrants, mainly from Afghanistan, are seen after they were detained by Turkish security forces during an operation in the border city of Van, Turkey late August 21, 2021. Afghans who manage to make the weeks-long journey through Iran on foot to the Turkish border face a three-meter high wall, ditches or barbed wire as Turkish authorities step up efforts to block any refugee influx into the country. (Photo by Murad Sezer/Reuters)
