Saudi artillery shells Yemen's capital Sanaa

SANAA, YEMEN - APRIL 24: Yemenis live amid the shrapnel pieces and rockets after Saudi artillery on Friday shelled in Hamdan district of the Sana'a Governorate, Yemen on April 24, 2015. Saudi-led coalition warplanes on Friday renewed airstrikes on Houthi positions in Yemen. (Photo by Mohammed Hamoud/Anadolu Agency/Getty Images)