Is new North and South Korea deal a significant step?

A new joint agreement signed by leaders of North and South Korea marked their most significant progress toward peace to date. Kim Jong Un and Moon Jae-in pledged a "new era," with Kim agreeing to dismantle his main missile testing site, as well as his main nuclear weapons complex -- with conditions. Yamiche Alcindor talks with Bruce Klingner of the Heritage Foundation and Jenny Town of 38 North.