Iraqi Shiite men brandish their weapons as they show their willingness to join Iraqi security forces in the fight against Jihadist militants who have taken over several northern Iraqi cities, on June 18, 2014, in the capital Baghdad.  Saudi Arabia warned of the risks of a civil war in Iraq with unpredictable consequences for the region, after Sunni militants seized large areas from Shiite-led government forces. AFP PHOTO/ ALI AL-SAADI        (Photo credit should read ALI AL-SAADI/AFP/Getty Images)