Kim Ahn : Apparent breakthrough on N. Korean nukes comes at critical time . She says Obama administration sees regime not likely to happen . Ahn : China 's sway could grow with food crisis ; and there are signs that U.S. influence waning . `` Why would [ North Korea ] deal with the United States ? '' Ahn : Still , North Korea wants China to lift its sanctions and to formally end Korean War .
Kim Ahn : Apparent breakthrough on N. Korean nukes comes at critical time . She says Obama administration sees regime not likely to happen . Ahn : China 's sway could grow with food crisis ; and there are signs that U.S. influence waning . Ahn : Still , North Korea wants China to lift its sanctions and to formally end Korean War .