During a fleeting truce, Iranians covertly devised a plan to raise the war’s costs for President Trump if U.S. forces attacked anew. By Farnaz Fassihi and Neil MacFarquhar A drone attack sent smoke billowing from a giant Saudi oil facility, the largest such plant in the world. Two gas tankers burst into flames at an Egyptian port near the Suez Canal, a crucial choke point in global trade. Fireballs erupted over Jordan as missiles flew toward a base housing U.S. personnel. War has enveloped a widening circle of targets across the Middle East in recent days, as Iran and its phalanx of proxy militias have sought to strike at U.S. allies, roil global markets and push the United States to halt its campaign against the Islamic Republic.