South Koreans in Seoul on Wednesday watch a news report about a missile launch. Chung Sung-Jun/Getty Images hide caption
denuclearization
A man at a railway station in Seoul watches a television showing file footage of a North Korean missile launch on Thursday. Earlier, North Korea had fired two short-range missiles into the sea. Jung Yeon-je/AFP/Getty Images hide caption
Russian President Vladimir Putin (right) toasts with North Korea's leader Kim Jong Un after their talks in Vladivostok, Russia, on Thursday. Alexei Nikolsky/AP hide caption
Protesters hold a banner showing images, of President Trump, Secretary of State Mike Pompeo, and National Security Adviser John Bolton during a rally against U.S. sanctions on North Korea, near the U.S. Embassy in Seoul, South Korea. Ahn Young-joon/AP hide caption
North Korean Vice Foreign Minister Choe Son Hui, center, speaks at a gathering for diplomats in Pyongyang, North Korea, on Friday. Eric Talmadge/AP hide caption
President Trump and North Korea's leader Kim Jong Un (right) hold a bilateral meeting during the second U.S.-North Korea summit in Hanoi, Vietnam, on Thursday. Saul Loeb/AFP/Getty Images hide caption
President Trump speaks as Secretary of State Mike Pompeo looks on during a news conference following the summit in Hanoi, Vietnam. Trump's second summit with Kim Jong Un collapsed Thursday without an agreement between the two leaders. SeongJoon Cho/Bloomberg via Getty Images hide caption
North Korea's leader Kim Jong Un and President Trump walk together at a resort on Sentosa Island in Singapore on June 12, 2018. Evan Vucci/AP hide caption
A TV screen shows file footage of President Trump and North Korean leader Kim Jong Un during a news program seen at the Seoul Railway Station in Seoul, South Korea, Wednesday. During Trump's State of the Union address, he announced that the second summit with the North Korean leader will take place this month. Lee Jin-man/AP hide caption
North Korean leader Kim Jong Un (left) and President Trump shake hands at the conclusion of their first summit in Singapore last year. North Korea says preparations for a second summit are underway. Susan Walsh/AP hide caption
In this Dec. 12, 2012, file photo released by Korean Central News Agency, North Korea's Unha-3 rocket lifts off from the Sohae launch pad in Tongchang-ri, North Korea. In 2018, North Korea's government said it would destroy the facility. KCNA via AP hide caption
People at a railway station in Seoul, South Korea, watch a TV screen showing North Korean leader Kim Jong Un delivering his New Year's speech on Tuesday. Ahn Young-joon/AP hide caption
This July 22 satellite image, released and annotated by 38 North on Monday, shows what the U.S. research group says is the partial dismantling of the rail-mounted transfer structure (center) at the Sohae launch site in North Korea. Airbus Defense & Space/38 North via AP hide caption
North Korean leader Kim Jong Un views the Hwasong-15 missile in this undated photo released by North Korea's Korean Central News Agency. The missile is believed to be capable of reaching the continental United States. KCNA via Reuters hide caption
'Complete, Verifiable, Irreversible' A Tough Goal For North Korea Summit
North Korean leader Kim Jong Un, left, inspects what the North claims is a thermonuclear warhead. At right is a test of a North Korean ballistic missile. STR/Getty Images hide caption
U.S. President Donald Trump meets with Hyeonseo Lee (far left) and other North Korean defectors in the Oval Office of the White House on Feb. 2, 2018. Zach Gibson-Pool/Getty Images hide caption
North Korean Defector Hopes To See Loved Ones Again — But Remains Skeptical
A woman walks past a news screen showing file footage of South Korean President Moon Jae-in and North Korean leader Kim Jong Un at a railway station in Seoul this week. Kim will walk across the Demilitarized Zone on Friday for a historic summit with Moon. Jung Yeon-Je/AFP/Getty Images hide caption
North Korea's Kim Jong Un waves during a military parade in Pyongyang celebrating what would be the 105th birthday of his grandfather and the country's founding leader Kim Il Sung. Wong Maye-E/AP hide caption
A concrete marker with the North Korean and Chinese national flags has the words "China North Korea Border," at a crossing in the Chinese border town of Tumen in eastern China's Jilin province. Ng Han Guan/AP hide caption
North Korean leader Kim Jong Un, right, and Choe Ryong Hae, vice chairman of the central committee of the Workers' Party, arrive for the official opening of the Ryomyong residential area, in April 2017 in in Pyongyang, North Korea. Wong Maye-E/AP hide caption
South Korean Unification Minister Cho Myung-gyun (left) shakes hands with North Korean chief delegate Ri Son Gwon after their meeting Tuesday at the village of Panmunjom in the Demilitarized Zone dividing the two countries. AFP/Getty Images hide caption