North Korean leader Kim Jong Un has concluded his six-day trip to Russia, which raised concerns about weapons transfer deals between the two countries. Kim’s armored train departed from a railway station in Artyom, Russia, and he is expected to return to Pyongyang on Monday afternoon. During his trip, Kim met with President Vladimir Putin and visited military and technology sites, highlighting the deepening defense cooperation between the two countries. Experts believe that North Korea may provide munitions to Russia in exchange for advanced weapons technology to further its nuclear ambitions. The international community has expressed concern over this illegal military cooperation.