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Anniversary of the slaughter of Srebrenica, Bosnia, where more than 8000 Muslim civilians were killed in 1995 by the Serbian army. Funeral prayer is performed for the 175 newly identified Srebrenica victims during the mass burial ceremony at Srebrenica-Potocari Memorial and Cemetery in Srebrenica, Bosnia and Herzegovina, July 11, 2014. (Photo by Laura Tarraga Garrido/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

Anniversary of the slaughter of Srebrenica, Bosnia, where more than 8000 Muslim civilians were killed in 1995 by the Serbian army. Funeral prayer is performed for the 175 newly identified Srebrenica victims during the mass burial ceremony at Srebrenica-Potocari Memorial and Cemetery in Srebrenica, Bosnia and Herzegovina, July 11, 2014. (Photo by Laura Tarraga Garrido/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

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Anniversary of the slaughter of Srebrenica, Bosnia, where more than 8000 Muslim civilians were killed in 1995 by the Serbian army. Funeral prayer is performed for the 175 newly identified Srebrenica victims during the mass burial ceremony at Srebrenica-Potocari Memorial and Cemetery in Srebrenica, Bosnia and Herzegovina, July 11, 2014. (Photo by Laura Tarraga Garrido/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

Anniversary of the slaughter of Srebrenica, Bosnia, where more than 8000 Muslim civilians were killed in 1995 by the Serbian army. Funeral prayer is performed for the 175 newly identified Srebrenica victims during the mass burial ceremony at Srebrenica-Potocari Memorial and Cemetery in Srebrenica, Bosnia and Herzegovina, July 11, 2014. (Photo by Laura Tarraga Garrido/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

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Anniversary of the slaughter of Srebrenica, Bosnia, where more than 8000 Muslim civilians were killed in 1995 by the Serbian army. Funeral prayer is performed for the 175 newly identified Srebrenica victims during the mass burial ceremony at Srebrenica-Potocari Memorial and Cemetery in Srebrenica, Bosnia and Herzegovina, July 11, 2014. (Photo by Laura Tarraga Garrido/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

Anniversary of the slaughter of Srebrenica, Bosnia, where more than 8000 Muslim civilians were killed in 1995 by the Serbian army. Funeral prayer is performed for the 175 newly identified Srebrenica victims during the mass burial ceremony at Srebrenica-Potocari Memorial and Cemetery in Srebrenica, Bosnia and Herzegovina, July 11, 2014. (Photo by Laura Tarraga Garrido/NurPhoto) (Photo by NurPhoto/Corbis via Getty Images)

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Anniversary of the slaughter of Srebrenica, Bosnia, where more than 8000 Muslim civilians were killed in 1995 by the Serbian army. Funeral prayer is performed for the 175 newly identified Srebrenica victims during the mass burial ceremony at Srebrenica-Potocari Memorial and Cemetery in Srebrenica, Bosnia and Herzegovina, July 11, 2014. (Photo by Laura Tarraga Garrido/NurPhoto) (Photo by NurPhoto/NurPhoto via Getty Images)

Anniversary of the slaughter of Srebrenica, Bosnia, where more than 8000 Muslim civilians were killed in 1995 by the Serbian army. Funeral prayer is performed for the 175 newly identified Srebrenica victims during the mass burial ceremony at Srebrenica-Potocari Memorial and Cemetery in Srebrenica, Bosnia and Herzegovina, July 11, 2014. (Photo by Laura Tarraga Garrido/NurPhoto) (Photo by NurPhoto/NurPhoto via Getty Images)

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Visitors to the Srebrenica massacre memorial look through the names of those who perished at the hands of the Serbian Army in July, 1995. (Photo by David Bathgate/Corbis via Getty Images)

Visitors to the Srebrenica massacre memorial look through the names of those who perished at the hands of the Serbian Army in July, 1995. (Photo by David Bathgate/Corbis via Getty Images)