Shi'ite fighters, from the brigades of peace loyal to Shi'ite cleric Moqtada al-Sadr, who have joined the Iraqi army to fight against militants of the Islamic State, formerly known as the Islamic State of Iraq and the Levant (ISIL), take part in field training in Najaf, August 23, 2014. (Photo by Alaa Al-Marjani/Reuters)
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