An image released by South Korea's spy agency purports to show Kim Jong Un inspecting North Korean troops ahead of deployment to Russia.National Intelligence Service of South KoreaSouth Korea says 1,500 North Korean troops have been sent to aid Russia in its war in Ukraine.Its troops being deployed to Russia would mark a major shift in North Korea's foreign relations.And the growing partnership poses a significant global risk, according to North Korean experts.South Korea's claims that North Korea is readying troops to send to fight in Ukraine have put the world on high alert for a major escalation.Experts on North Korea say the move would be a worrying upgrade to its relationship with Russia.