U.S. President Donald Trump is threatening more airstrikes on Iran. The U.S. military says it launched strikes on Iranian military sites Wednesday. Tehran fired back at countries in the region. Trump told reporters at the White House hours later that “we're going to hit them again hard today.” The escalating attacks threatened to derail efforts to end the war. Bahrain, Kuwait and Jordan came under Iranian fire. It was the second time this week that back-and-forth strikes have tested a two-month ceasefire. Iran and Israel targeted each other on Monday. Shortly after Trump spoke, the U.S. military said it had fired on an oil tanker trying to transport oil from Iran in violation of its blockade on Iranian ports.