A Saudi military spokesman vows his country will to step up pressure on the Houthi militia and their allies in Yemen. Saudi-led airstrikes which began last week, appear to be targeting Yemen’s fleet of fighter aircraft and military command centers. The air attacks could be a way to ease the way for a land invasion. Many Arab states, including Egypt and Jordan support the Saudi strikes against Yemen in large part as block to Iran’s reach and Islamist extremism, but the Saudi military objectives remain unclear. We explore the growing chaos in Yemen, how regional powers are aligning and debate over the role of the U.S.