Sixty-six years after the Korean War was halted in an armistice, U.S. President Donald Trump on Sunday became the first sitting American leader to set foot on North Korean soil when he met dictator Kim Jong Un for the third time in just over a year.

Trump and Kim met at the heavily fortified truce village of Panmunjom in the Demilitarized Zone, where Trump shook hands with the young leader at the military demarcation line and crossed into the North in a once-unthinkable display that was rich in symbolism.

U.S. talks with the North over its nuclear weapons program had been on ice since the last Kim-Trump summit, in February in Hanoi, collapsed amid major differences over the scope of North Korea's denuclearization and potential sanctions relief by the United States.