** FILE ** In this Monday, April 23, 2007 file photo, Sudanese Darfur survivor Ibrahim holds human skulls at the site of a mass grave where he says the remains of 25 of his friends and fellow villagers lie, on the outskirts of the West Darfur town of Mukjar, Sudan. The International Criminal Court issued an arrest warrant Wednesday, March 4, 2009 for Sudanese President Omar al-Bashir on charges of war crimes and crimes against humanity in Darfur. (AP Photo/Nasser Nasser, File)