Yemen’s Houthi rebels have attacked a British cargo ship and shot down a U.S. drone, further escalating tensions in the region. What Happened: The Houthi rebels, who are backed by Iran, claimed responsibility for the attack on the British cargo ship and the downing of the American drone, Politico reported. The cargo ship, Rubymar, flying the Belize flag, was damaged in the Gulf of Aden. The ship’s crew has been reported safe. Yahya Sare‘e, the Houthi spokesperson, announced the attack on social media. The ship, operated by a Lebanese company, was en route from the United Arab Emirates to Bulga…