Tour guide's landmark question sets me thinking

For the Korean Peninsula, 2018 will be remembered as the year diplomacy improved by the greatest degree since the armistice halted the Korean War in 1953.

Last year witnessed numerous inter-Korean sports events, artistic performances and unprecedented military cooperation.

As a journalist covering most of these events, my most memorable moment of the year, however, was a question asked by a tour guide in the Democratic People's Republic of Korea.