APTOPIX Bosnia Srebrenica

People pause before praying at the Potocari memorial complex, close to Srebrenica, 150 kilometers northeast of Sarajevo, Bosnia and Herzegovina, Thursday, July 9, 2015. The 20th anniversary of the Srebrenica massacre, the worst crime in Europe after the Nazi era, will be marked on Saturday, July 11, 2015. (AP Photo/Marko Drobnjakovic)

Memorial ceremony to mark the 17th anniversary of the Srebrenica massacre,11 July 2012.
Memorial ceremony to mark the 17th anniversary of the Srebrenica massacre,11 July 2012.