People gather to mourn the Cairo church bombing victims in Cairo, Egypt on Dec. 12, 2016. A bomb went off inside a church in the Egyptian capital of Cairo on Dec. 11, which left at least 25 people dead. (Xinhua/Zhao Dingzhe)
People gather to mourn the Cairo church bombing victims in Cairo, Egypt on Dec. 12, 2016. A bomb went off inside a church in the Egyptian capital of Cairo on Dec. 11, which left at least 25 people dead. (Xinhua/Zhao Dingzhe)