AP
FILE - In this Dec. 23, 2017, file photo distributed on Dec. 24, 2017, by the North Korean government, North Korean leader Kim Jong Un speaks during the conference of cell chairpersons of the ruling party in Pyongyang. Kim said the United States should be aware that his country's nuclear forces are now a reality, not a threat. Kim was speaking in his New Year's Day address. Independent journalists were not given access to cover the event depicted in this image distributed by the North Korean government. The content of this image is as provided and cannot be independently verified. Korean language watermark on image as provided by source reads: "KCNA" which is the abbreviation for Korean Central News Agency. (Korean Central News Agency/Korea News Service via AP, File)
- HOGP
Visitors walk by a TV screen showing a TV news program reporting about North Korean leader Kim Jong Un's New Year's speech, at the Seoul Railway Station in Seoul, South Korea, Monday, Jan. 1, 2018. The letters read on top left, "Kim Jong Un delivers New Year's speech." Kim said the United States should be aware that his country's nuclear forces are now a reality, not a threat. (AP Photo/Lee Jin-man)
- Lee Jin-man
South Koreans watch a TV news program showing North Korean leader Kim Jong Un's New Year's speech, at the Seoul Railway Station in Seoul, South Korea, Monday, Jan. 1, 2018. The letters read on top left, "Kim Jong Un delivers New Year's speech." Kim said Monday the United States should be aware that his country's nuclear forces are now a reality, not a threat. But he also struck a conciliatory tone in his New Year's address, wishing success for the Winter Olympics set to begin in the South in February and suggesting the North may send a delegation to participate. (AP Photo/Lee Jin-man)
- Lee Jin-man
South Koreans watch a TV news program showing North Korean leader Kim Jong Un's New Year's address, at the Seoul Railway Station in Seoul, South Korea, Monday, Jan. 1, 2018. The part of letters on the bottom "South Korea and U.S., Nuclear War exercise." and on top left, "Kim Jong Un delivers New Year's address." North Korean leader Kim Jong Un said Monday, Jan. 1, 2018, the United States should be aware that his country's nuclear forces are now a reality, not a threat. But he also struck a conciliatory tone in his New Year's address, wishing success for the Winter Olympics set to begin in the South in February and suggesting the North may send a delegation to participate.(AP Photo/Lee Jin-man)
- Lee Jin-man
In this image made from video released by KRT on Jan. 1, 2018, North Korean leader Kim Jong Un speaks in his annual address in undisclosed location, North Korea. North Korean leader Kim said Monday, Jan. 1, 2018, the United States should be aware that his country's nuclear forces are now a reality, not a threat. But he also struck a conciliatory tone in his New Year's address, wishing success for the Winter Olympics set to begin in the South in February and suggesting the North may send a delegation to participate. (KRT via AP Video)
- TEL
In this photo provided by the North Korean government, North Korean leader Kim Jong Un delivers his New Year's speech at an undisclosed place in North Korea Monday, Jan. 1, 2018. Kim said Monday the United States should be aware that his country's nuclear forces are now a reality, not a threat. Independent journalists were not given access to cover the event depicted in this image distributed by the North Korean government. The content of this image is as provided and cannot be independently verified. Korean language watermark on image as provided by source reads: "KCNA" which is the abbreviation for Korean Central News Agency. (Korean Central News Agency/Korea News Service via AP)
- HOGP