North Korea boosts support for Russia to include drone operators, Ukraine says

By Nick Paton Walsh, Daria Tarasova-Markina, Victoria Butenko, CNN Kyiv (CNN) — A new wave of North Korean troops, already numbering 8,500 in Russia, contains a drone unit that could attack targets inside Ukraine, according to a senior Ukrainian intelligence official. North Korea, who signed a NATO-style mutual defense pact with Russia two years ago,