What is the source of disagreement between the U.S. and North Korea?

The source of disagreement between the U.S. and North Korea is primarily related to North Korea's nuclear weapons program and the international sanctions imposed on the country as a result of it. The U.S. has been pressuring North Korea to give up its nuclear weapons and ballistic missile programs, while North Korea insists on retaining them as a means of deterrence against perceived threats from the U.S. Additionally, there are other longstanding issues, such as human rights abuses by North Korea and the U.S. military presence in South Korea, which contribute to the tension and dispute between the two countries.