An Iraqi Army tank prepares to attack Islamic State extremists in Tikrit, 130 kilometers (80 miles) north of Baghdad, Iraq, Friday, March 13, 2015. Iraqi forces entered Tikrit for the first time on Wednesday from the north and south. On Friday, they fought fierce battles to secure the northern Tikrit neighborhood of Qadisiyya and lobbed mortars and rockets into the city center, still in the hands of IS. Iraqi military officials have said they expect to reach the center of Tikrit within two to three days. (AP Photo/Khalid Mohammed)
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