Since coming under international sanctions following a nuclear test in 2006,
North Korea has used a variety of methods to circumvent trade restrictions.
At-sea transfers of coal, fuel and seafood have been one way for Pyongyang
to buy and sell. Above, the North Korean tanker Yu Jong 2 conducts an at-sea
transfer with a ship of unknown nationality in this picture taken by a Japanese
patrol aircraft on Feb. 16, 2018. The Japanese government assessed that the
vessels were involved in...