The United States said on Tuesday that it was expediting deliveries of weapons to Saudi Arabia , a sign of the Obama administration’s deepening involvement in the Saudi military offensive against the Houthi movement in Yemen . Speaking to reporters in Riyadh, the Saudi capital, Antony J. Blinken, the deputy secretary of state, said the United States had also increased its intelligence sharing and established a “joint coordination planning cell” with the Saudi government to help its war effort, according to the Reuters news agency. The show of support by the United States came two weeks after the Saudi military launched an air war against the Houthis, members of a rebel movement from northern Yemen that has seized territory and steadily expanded its influence […]