FILE - In this Thursday, Sept. 21, 2017, file photo distributed by the North Korean government, North Korean leader Kim Jong Un delivers a statement in response to U.S. President Donald Trump's speech to the United Nations, in Pyongyang, North Korea. North Korean Foreign Minister Ri Yong Ho said his country may conduct a "historic" hydrogen bomb test in the Pacific Ocean. Many experts think North Korea wouldn't do something so risky, but it's hard to rule out given North Korea's steadily expanding nuclear and missile tests. Independent journalists were not given access to cover the event depicted in this image distributed by the Korean Central News Agency via Korea News Service. The content of this image is as provided and cannot be independently verified. (Korean Central News Agency/Korea News Service via AP, File)