Among some U.S. officials, congressional aides, analysts and others who track North Korea, there was a sigh of relief Thursday as President Donald Trump headed home from Vietnam empty-handed from his talks with North Korean leader Kim Jong Un.

Trump said he walked away from a deal because of Kim’s demands to lift all U.S.-led sanctions on North Korea in return for the denuclearization of its Yongbyon atomic complex but not others that the United States knows about.

In contrast, North Korea’s foreign minister said Pyongyang offered to dismantle Yongbyon in return for a partial lifting of sanctions as a step toward better relations between the nations, technically still at war because the 1950-53 Korean War ended in an armistice rather than a peace treaty.