North Korea 's swings between provocation and negotiation . Analysts say anti-American diplomacy follows a familiar pattern . The North Korea insists de-nuclearization is a pre-condition of talks . Analysts say North Korea behavior is now an embarrassment to North Korea .
North Korea swings between provocation and negotiation . Analysts say North Korean diplomacy follows a familiar pattern . The U.S. insists de-nuclearization is a pre-condition of talks . Analysts say North Korea 's behavior is now an embarrassment to China .