Iraqi Shiite tribesmen brandish their weapons as they gather to show their readiness to join Iraqi security forces in the fight against Jihadist militants who have taken over several northern Iraqi cities, on June 16 2014, in the southern Shiite Muslim shrine city of Najaf. Faced with a militant offensive sweeping south toward Baghdad, Prime Minister Nuri al-Maliki announced the Iraqi government would arm and equip civilians who volunteer to fight, and thousands have signed up. AFP PHOTO/HAIDAR HAMDANI        (Photo credit should read HAIDAR HAMDANI/AFP/Getty Images)