U.S. President Joe Biden hailed trilateral cooperation with South Korea and Japan to deter North Korean threats as one of his biggest foreign policy successes ahead of the end of his presidency, but warned that the next administration will continue to face challenges as Pyongyang draws closer to Moscow.

In his last foreign policy speech at the State Department on Monday, the outgoing president emphasized his efforts to bring Seoul and Tokyo closer and forge a lasting coalition.

“We did what few thought was possible, to build the first-ever trilateral partnership between the United States, Japan and South Korea,” Biden