Yemeni supporters of the separatist Southern Movement burn tires in the southern city of Aden on February 15, 2015, during a protest against the Shiite Huthi militia which seized power in the country last September. Shiite militiamen who overran the capital Sanaa vowed to defy "threats" as the UN Security Council prepared to adopt a resolution calling on them to step aside or face consequences. AFP PHOTO / STR (Photo credit should read -/AFP/Getty Images)
