Many are upset that the wealthy can afford to purchase clean spring water, while they must rely on blocks of ice from polluted rivers.
Pyongyang says it is holding Otto Frederick Warmbier in a statement released 20 days after taking him into custody.
The saying ‘samcheonmutong’ means judicial officials will look the other way as North Koreans watch the South's movies and TV shows.
Many residents fear that further seismic events will topple their shoddily built apartments and office buildings.
Mix of Seoul's pop music, information about wealthier, democratic South is known to rankle the North.
Experts doubt Pyongyang claims of advanced bomb in blast that caught allies, foes off guard and is likely to draw new UN sanctions.