In response to North Korea's requests to return its bulk carrier ship,... a U.S. official says international sanctions remain in place and are to be enforced by all UN members.br The U.S. State Department official was quoted in a Voice of America report,... and added that President Trump believes North Korean leader Kim Jong-un will fulfill his commitment to denuclearize.br The official also said the U.S. remains open to diplomatic negotiations with Pyeongyang to make further progress on that goal.