The Yemeni Houthis attacked three ships off the coast of the country yesterday, firing ballistic missiles at them. The group, which controls most of Yemen, also targeted a U.S. warship with drones, the AP reports. “These attacks represent a direct threat to international commerce and maritime security,” the U.S. Central Command said in a statement. “They have jeopardized the lives of international crews representing multiple countries around the world.” “The United States will consider all appropriate responses in…