A man wrapped in a Serb flag adorned with a photo of former Bosnian Serb military leader Ratko Mladic, pray in a church as part of ceremonies to celebrate a banned Serb holiday in the Bosnian town of Banja Luka, Tuesday, Jan. 9, 2018. The Jan. 9 holiday commemorates the date in 1992 when Bosnian Serbs declared the creation of their own state in Bosnia, igniting the country's devastating 4-year war. (AP Photo/Radivoje Pavicic)