SANA'A, YEMEN - JUNE 14: Houthi supporters gather at the old gates to protest against the Saudi Arabian coalition air-strikes on June 14, 2015 in Sana'a, Yemen. UN peace talks are set to begin in Geneva June 15. (Photo by Sebastiano Tomada/Getty Images)
SANAA, YEMEN - DECEMBER 14: A group of Houthis (Ansar Allah Movement) members perform during a military training session at a camp in Nuqom region of Sanaa, Yemen on December 14, 2015. (Photo by Mohammed Hamoud /Anadolu Agency/Getty Images)
YEMEN - APRIL 27: Yemeni locals are seen along the coast in the port town of Al Hodeidah, Yemen, with an oil depot in the distance, on Thursday, April 27, 2006. Republic of Yemen is located in the Middle East, bordering the Arabian Sea, Gulf of Aden, and Red Sea, between Oman and Saudi Arabia. Yemen, which has a population of 16 million and is one of the poorest Arab countries, depends on oil for 85 percent of its revenue. (Photo by Paul Hilton/Bloomberg via Getty Images)
TAIZ, YEMEN - NOVEMBER 04: Members of the Yemeni Popular Resistance forces who protect the city against Houthis stand guard at their checkpoint on the foggy street as a result of Cyclone Chapala, generated in the Arabian Sea, influences eastern and southern Yemen, causes heavy fog and rain, in Taiz, Yemen on November 04, 2015. (Photo by Abdulnasser Al Seddik/Anadolu Agency/Getty Images)
