North Korean troops who helped Russia repel a major Ukrainian incursion into its western Kursk region are now playing an important role in clearing the area of mines, the Russian Defence Ministry said on Friday. Under a mutual defence pact between the two countries, North Korea last year sent some 14,000 soldiers to fight alongside Russia in Kursk, and more than 6,000 were killed, according to South Korean, Ukrainian and Western sources. Video published by the Russian Defence Ministry showed North Korean troops being shown different types of mines and mine detection equipment, taking part in training exercises and singing...