North Korea nukes

South Korea's Foreign Minister Cho Hyun met IAEA Director General Rafael Mariano Grossi in Seoul on April 15 to discuss Seoul's nuclear-powered submarine program—stemming from last year's summits with the United States—and North Korea's nuclear activities. Cho reaffirmed commitment to Nuclear Non-Proliferation Treaty (NPT) obligations, earning Grossi's praise for South Korea's 'full and unambiguous' nonproliferation efforts.