The United States has launched a second round of airstrikes on Iran and Iran has fired back at Gulf States after President Donald Trump warned that Tehran would “pay the price” for stalled negotiations. The new U.S. assault across multiple Iranian cities came Thursday as efforts to negotiate an end the war again appeared stuck, with Iran insisting it would maintain its chokehold on the Strait of Hormuz, which has disrupted global energy supplies and sent oil prices higher. Iran retaliated with strikes targeting Bahrain, Kuwait and Jordan, all of which host U.S. troops. Kuwait closed its airspace in response.