Weapons proliferation

North Korean negotiator Kim Miyong Gil reads statement outside the North Korean Embassy in Stockholm, Sweden, Saturday, Oct. 5, 2019. North Korea's chief negotiator said Saturday that discussions with the U.S. on Pyongyang's nuclear program have broken down, but Washington said the two sides had "good discussions" that it intends to build on in two weeks. (Kyodo News via AP)

North Korean negotiator Kim Miyong Gil, center, reads statement outside the North Korean Embassy in Stockholm, Sweden, Saturday, Oct. 5, 2019. North Korea's chief negotiator said Saturday that discussions with the U.S. on Pyongyang's nuclear program have broken down, but Washington said the two sides had "good discussions" that it intends to build on in two weeks. (Kyodo News via AP)

North Korean negotiator Kim Miyong Gil, center, reads statement outside the North Korean Embassy in Stockholm, Sweden, Saturday, Oct. 5, 2019. North Korea's chief negotiator said Saturday that discussions with the U.S. on Pyongyang's nuclear program have broken down, but Washington said the two sides had "good discussions" that it intends to build on in two weeks. (Kyodo News via AP)

Former National security adviser John Bolton gestures while speakings at the Center for Strategic and International Studies in Washington, Monday, Sept. 30, 2019. (AP Photo/Pablo Martinez Monsivais)

FILE - In this June 30, 2019, file photo, U.S. President Donald Trump, right, meets with North Korean leader Kim Jong Un at the border village of Panmunjom in the Demilitarized Zone, South Korea. North Korea on Friday, Sept. 27, 2019, says it wants Trump to make a "wise option and bold decision" to produce a breakthrough in stalled nuclear diplomacy. The statement by Foreign Ministry adviser Kim Kye Gwan came days after Trump said another meeting with Kim Jong Un "could happen soon" without elaborating. (AP Photo/Susan Walsh, File)

FILE - In this June 30, 2019, file photo, U.S. President Donald Trump, right, meets with North Korean leader Kim Jong Un at the border village of Panmunjom in the Demilitarized Zone, South Korea. North Korea on Friday, Sept. 27, 2019, says it wants Trump to make a "wise option and bold decision" to produce a breakthrough in stalled nuclear diplomacy. The statement by Foreign Ministry adviser Kim Kye Gwan came days after Trump said another meeting with Kim Jong Un "could happen soon" without elaborating. (AP Photo/Susan Walsh, File)

Zimbabwe's President Emmerson Dambudzo Mnangagwa addresses the 74th session of the United Nations General Assembly, Wednesday, Sept. 25, 2019, at the U.N. headquarters. (AP Photo/Frank Franklin II)

FILE - In this June 30, 2019, file photo, U.S. President Donald Trump, left, meets with North Korean leader Kim Jong Un at the North Korean side of the border at the village of Panmunjom in Demilitarized Zone. North Korea on Friday, Sept. 20, 2019, has praised President Donald Trump for saying Washington may pursue an unspecified "new method" in nuclear negotiations with Pyongyang. (AP Photo/Susan Walsh, File)

In this photo released by the official website of the office of the Iranian Presidency, President Hassan Rouhani speaks in a cabinet meeting in Tehran, Iran, Wednesday, Sept. 11, 2019. Rouhani urged the U.S. on Wednesday to "put warmongers aside" as tensions roil the Persian Gulf amid an escalating crisis between Washington and Tehran in the wake of the collapsing nuclear deal with world powers. (Iranian Presidency Office via AP)

This Saturday, Aug. 24, 2019, photo provided Sunday, Aug. 25, by the North Korean government, shows the test firing of an unspecified missile at an undisclosed location in North Korea. North Korea fired two suspected short-range ballistic missiles off its east coast on Saturday in the seventh weapons launch in a month, South Korea's military said, a day after it vowed to remain America's biggest threat in protest of U.S.-led sanctions on the country. 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)