North Korea has a population of around 24 million people but a photo released by NASA reveals that at night the country is almost completely dark compared to its neighbors China and South Korea.

Eighty-nine-year-old Aiko Nakamoto has never returned to Japan after moving with her husband to Hamhung, his hometown in North Korea, in 1960. Now, her sister, Keiko Hayashi, 69, and Keiko’s ...