Rising tensions have led to Pyongyang threatening missile and nuclear strikes against the United States and its ally South Korea.
Extreme swimmers take the plunge to support competitors forced to perform in South Korea without the Russian flag.
Officials from Russia and North Korea say the long-waited train connection is now almost ready.
Total of 140,000 tonnes is on its way from Siberia thanks to cooperation between the two warring nations.
The move comes amid hope of large-scale investment from Seoul into Siberia.
Russian athletes will perform at the 2018 Winter Olympics in South Korea under a white flag, following controversial IOC ruling.
South Korean diplomat wins two day tournament in sunshine on frozen Lable Baikal.
Lab-made dog was created from tiny fragment of its mom's ear by the South Korean team working at bringing back the woolly mammoth.