The dispatch of Assistant Secretary Christopher Hill to the region underlines U.S. concern about the six-party deal, which appears to be crumbling amid North Korea moves to reverse disarmament steps.

• 派遣希尔前往该地区显示美国对六方协议的关切，由于北韩有可能逆转其废核步骤，这项协议目前看来似乎会夭折。