President Trump says Kim Jong Un told him that North Korea is destroying a major missile engine testing site.
"North Korea is already destroying a major missile engine testing site," Trump said.
The commitment was not included in the joint declaration the two men signed, but Trump said: "We agreed to that after the agreement was signed."
Trump also outlined the agreement that he and Kim signed earlier. He said Kim reaffirmed "his unwavering commitment to complete denuclearization of the Korean peninsula."
Trump said Kim "wants to do that."
"This is not the past," he said. "This is not another administration that never got it started. And therefore never got it done."