A train believed to be carrying North Korean leader Kim Jong Un has reportedly left for Russia, possibly for a meeting with Russian President Vladimir Putin. The meeting could take place as soon as Tuesday. While South Korean government sources have not confirmed the details, U.S. officials have previously stated that North Korea and Russia were arranging a meeting between their leaders. The meeting could involve discussions about securing supplies of North Korean artillery for Russia and obtaining energy and food aid and advanced weapons technologies for North Korea. The article also highlights concerns about potential technology transfers increasing the threat posed by North Korea’s nuclear weapons and missiles.