Kuwaiti security forces gather outside the Shiite Al-Imam al-Sadeq mosque after it was targeted by a suicide bombing during Friday prayers on June 26, 2015, in Kuwait City. The Islamic State group-affiliated group in Saudi Arabia, calling itself Najd Province, said militant Abu Suleiman al-Muwahhid carried out the attack, which it claimed was spreading Shiite teachings among Sunni Muslims. AFP PHOTO / YASSER AL-ZAYYAT (Photo credit should read YASSER AL-ZAYYAT/AFP/Getty Images)