China must act, or risk emboldening two dangerous allies,” warns U.S. National Security Adviser Jake Sullivan as he presses China to curb North Korea’s troop involvement in Ukraine—a bombshell development that threatens to shake up the balance of power in Europe.

Ukraine's top military commander, Oleksandr Syrskyi, said on Saturday that there were reports North Korean troops were preparing for combat alongside Russian forces. "We have numerous reports of North Korean soldiers preparing to participate in combat operations alongside Russian Forces,