A follower of the Shi'ite Houthi movement holds his rifle during a demonstration to commemorate Ashura in Yemen's capital Sanaa October 24, 2015. Ashura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. (Photo by Khaled Abdullah/Reuters)
