11.  It was the first known collision of ships from the two hostile Korean states in international waters.

12.  Kim said inter-Korean tension would further ease if a cross-border railway linking the two Korean states is built as scheduled.

13.  North Korea proposed on Friday that the Red Cross hold talks on another round of reunions for families divided between the two Korean states.

14.  North Korea rejected a South Korean demand to release a southern tourist Tuesday, endangering a major tourism project between the rival Korean states.

15.  North Korea proposed Friday that the Red Cross hold talks on another round of reunions for families divided between the two Korean states.

16.  North Korea rejects a South Korean demand to release a southern tourist Tuesday, endangering a major tourism project between the rival Korean states.

17.  The decision came amid a stall in reconciliation efforts between the two Korean states.

18.  The five-day, four-night tour to Diamond Mountain marks the first big joint venture between the two rival Korean states.

19.  The Korean states are technically in a state of war and no one can travel to the other side without government approval, which is rarely given.

20.  The mass spy repatriation is part of thawing relations following the June summit, the first ever between the Korean states.