By K.J. Kwon and Greg Botelho,CNN SEOUL, South Korea (CNN) — North Korea has proposed high-level talks with the United States to “ease tensions in the Korean Peninsula,” its state news agency reported early Sunday. The topics that “can be sincerely discussed” include easing military tensions, changing a truce treaty to a peace treaty, and nuclear matters, according to a statement from the North’s National Defense Commission, as reported by the state-run Korean Central News Agency.