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An Iraqi Shiite scholar enters a school for clerics, known in Arabic as Haouza, in the holy city of Najaf, 160 kms (100 miles) south of the capital Baghdad, on May 9, 2016. / AFP / HAIDAR HAMDANI (Photo credit should read HAIDAR HAMDANI/AFP/Getty Images)

An Iraqi Shiite scholar enters a school for clerics, known in Arabic as Haouza, in the holy city of Najaf, 160 kms (100 miles) south of the capital Baghdad, on May 9, 2016. / AFP / HAIDAR HAMDANI        (Photo credit should read HAIDAR HAMDANI/AFP/Getty Images)