Houthi Shiite Yemeni wearing army uniforms stand guard on a street leading to the presidential palace in Sanaa, Yemen, Wednesday, Jan. 21, 2015. Authorities in southern Yemen have closed the country’s second-largest airport there in protest over the Shiite rebels’ power grab in the capital, Sanaa, which has plunged the nation deeper into chaos and threatens to fracture the country. (AP Photo/Hani Mohammed)