Turkish riot police officers escort suspected members of the Islamic State group at a hospital for a medical check-up on the second day of their custody on July 11, 2015 in Istanbul. Turkey on July 10 detained 21 suspected members of the Islamic State group, including three foreigners, in a major operation in several cities including Istanbul, state media said. The detainees are suspected of helping the jihadist group recruit people from Europe as well as helping them travel to Syria, the official Anatolia news agency said. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images)