Kim's denuclearization pledge is similar to the one he made with South Korea in April

The agreement by Kim Jong Un to "work toward complete denuclearization of the Korean Peninsula" echoes his language after the summit with South Korean President Moon Jae-in in April.

In the Panmunjom Declaration, signed by Moon and Kim on April 27, both leaders "confirmed the common goal of realizing, through complete denuclearization, a nuclear-free Korean Peninsula."

When asked at his signing with Kim if North Korea had agreed to denuclearize, President Trump said, "We're starting that process very quickly, very, very quickly. Absolutely."

(CNN)