Noh Kyu-duk, South Korea's Special Representative for Korean Peninsula Peace and Security Affairs, speaks to Sung Kim (not pictured), US Special Representative for North Korea, and Takehiro Funakoshi (not pictured), Director-General of the Asian and Oceanian Affairs Bureau of the Ministry of Foreign Affairs of Japan, during their trilateral meeting at a hotel in Seoul , South Korea June 21, 2021. Jung Yeon-Je/Pool via REUTERS

Noh Kyu-duk (R), South Korea's Special Representative for Korean Peninsula Peace and Security Affairs, talks with Sung Kim (L), US Special Representative for North Korea, during their bilateral meeting at a hotel in Seoul , South Korea June 21, 2021. Jung Yeon-Je/Pool via REUTERS

Noh Kyu-duk (R), South Korea's Special Representative for Korean Peninsula Peace and Security Affairs, poses with Sung Kim (L), US Special Representative for North Korea, during their bilateral meeting at a hotel in Seoul , South Korea June 21, 2021. Jung Yeon-Je/Pool via REUTERS

Sung Kim, US Special Representative for North Korea, speaks to Noh Kyu-duk (not pictured), South Korea's Special Representative for Korean Peninsula Peace and Security Affairs, and Takehiro Funakoshi (not pictured), Director-General of the Asian and Oceanian Affairs Bureau of the Ministry of Foreign Affairs of Japan, during their trilateral meeting at a hotel in Seoul , South Korea June 21, 2021. Jung Yeon-Je/Pool via REUTERS

Takehiro Funakoshi, Director-General of the Asian and Oceanian Affairs Bureau of the Ministry of Foreign Affairs of Japan, speaks to Sung Kim (not pictured), US Special Representative for North Korea, Noh Kyu-duk (not pictured), South Korea's Special Representative for Korean Peninsula Peace and Security Affairs, during their trilateral meeting at a hotel in Seoul, South Korea June 21, 2021. Jung Yeon-Je/Pool via REUTERS

Sung Kim (L), US Special Representative for North Korea, talks with Noh Kyu-duk (C), South Korea's Special Representative for Korean Peninsula Peace and Security Affairs, and Takehiro Funakoshi (R), Director-General of the Asian and Oceanian Affairs Bureau of the Ministry of Foreign Affairs of Japan, during their trilateral meeting at a hotel in Seoul, South Korea June 21, 2021. Jung Yeon-Je/Pool via REUTERS

Sung Kim (L), US Special Representative for North Korea, Noh Kyu-duk (C), South Korea's Special Representative for Korean Peninsula Peace and Security Affairs, and Takehiro Funakoshi (R), Director-General of the Asian and Oceanian Affairs Bureau of the Ministry of Foreign Affairs of Japan, pose for a photo during their trilateral meeting at a hotel in Seoul, South Korea June 21, 2021. Jung Yeon-Je/Pool via REUTERS

International Atomic Energy Agency Director General Rafael Grossi arrives for the beginning of an IAEA board of governors meeting in Vienna, Austria, June 7, 2021. REUTERS/Leonhard Foeger

International Atomic Energy Agency Director General Rafael Grossi waits for the beginning of an IAEA board of governors meeting in Vienna, Austria, June 7, 2021. REUTERS/Leonhard Foeger

South Korean Unification Minister Lee In-young speaks during a ceremony to mark the third anniversary of Panmunjom declaration between South Korean President Moon Jae-in and North Korean leader Kim Jong Un near the border village of Panmunjom that separates the two Koreas since the Korean War, in Paju, South Korea, April 27, 2021. Ahn Young-joon/Pool via REUTERS

People carrying goods walk past shops that trade with North Korea, in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

A man points at the New Yalu River Bridge designed to connect China's Dandong New Zone and North Korea's Sinuiju, in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A woman rides a bicycle past shops and companies that trade with North Korea, near the customs building in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

People enjoy a playground at the Singapore City condominium near the New Yalu River Bridge in Dandong New Zone, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Cars travel past the New Yalu River Bridge designed to connect China's Dandong New Zone and North Korea's Sinuiju, in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A man stands next to a model of the New Yalu River Bridge and the Singapore City condominium at a property showroom in Dandong New Zone, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A general view shows the Singapore City condominium in Dandong New Zone, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Booklets of quotations and poems by former Chinese chairman Mao Zedong are seen amid North Korean banknotes at a souvenir stall in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Workers are seen on a construction site near the New Yalu River Bridge designed to connect China's Dandong New Zone and North Korea's Sinuiju, in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

The New Yalu River Bridge designed to connect China's Dandong New Zone and North Korea's Sinuiju, is seen from Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

The New Yalu River Bridge designed to connect China's Dandong New Zone and North Korea's Sinuiju, is seen from a hotel under construction in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A man cycles past the North Korea consular office in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Men at a field in North Korea's Sinuiju are seen from Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A man walking across a field in North Korea's Sinuiju is seen from Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A woman walks past an entrance of the customs in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

Buildings in North Korea's Sinuiju with giant portraits of late North Korean leaders Kim Il Sung and Kim Jong Il are seen from China's Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A Chinese cruise boat passes buildings in North Korea's Sinuiju on the Yalu River separating North Korea and China, in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Tourists dressed in North Korean costumes dance as they pose for pictures near the Friendship Bridge and Broken Bridge over the Yalu River, which separates North Korea's Sinuiju from China, in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

Women dine at a Korean restaurant in Dandong New Zone, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Men at a field in North Korea's Sinuiju are seen from Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A factory building North Korea's Sinuiju is seen from Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A tourist holding Chinese national flags walks on the Broken Bridge next to the Friendship Bridge over the Yalu River, which separates North Korea's Sinuiju from China, in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

A man stands near a fluttering Chinese national flag on a cruise boat on the Yalu River separating North Korea and China, in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

The North Korean flag flutters at the North Korea consular office in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A general view of buildings in North Korea's Sinuiju as seen from China’s Dandong, Liaoning province April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

A Chinese national flag flutters near the Friendship Bridge and Broken Bridge over the Yalu River, which separates North Korea's Sinuiju from China, in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

People take on a cruise boat on the Yalu River separating North Korea and China, in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Staff members wait for customers at a shop selling imported goods, near the Yalu River separating North Korea and China, in Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Buildings in North Korea's Sinuiju are seen near an old railway bridge from China's Dandong, Liaoning province, China April 20, 2021. Picture taken April 20, 2021. REUTERS/Tingshu Wang

Freight cars with Korean characters reading "Seopo" and "Dandong" are seen at a train station in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

Freight cars are seen at a train station in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

A man walks near freight cars with Korean characters reading "Seopo" and "Dandong" at a train station in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

Freight cars with Korean characters reading "Seopo" and "Dandong" are seen at a train station in Dandong, Liaoning province, China April 21, 2021. REUTERS/Tingshu Wang

The rising sun illuminates a fishing boat on the Yalu river, which separates North Korea's Sinuiju from China, in Dandong, Liaoning province, China April 20, 2021. REUTERS/Tingshu Wang

Workers are seen near buildings marked as epidemiological survey area inside the Chinese customs office in Dandong, Liaoning province, China April 20, 2021. REUTERS/Tingshu Wang

Workers stand near tents inside the Chinese customs office in Dandong, Liaoning province, China April 20, 2021. REUTERS/Tingshu Wang

Buildings in North Korea's Sinuiju are seen behind the Friendship Bridge over the Yalu river, during sunrise in Dandong, Liaoning province, China April 20, 2021. REUTERS/Tingshu Wang

Buildings in North Korea's Sinuiju are seen behind the Friendship Bridge over the Yalu river, in Dandong, Liaoning province, China April 20, 2021. REUTERS/Tingshu Wang

A view of the Friendship Bridge and Broken Bridge over the Yalu River, which separates North Korea's Sinuiju from China, during sunrise in Dandong, Liaoning province, China April 20, 2021. REUTERS/Tingshu Wang

Tous les tirs de missiles balistiques du régime nord-coréen.

South Korean officials see bigger and better short-range ballistic missiles as a way to reduce their dependence on the United States.

All ballistic missile launches under the leadership of Kim Jong Il and Kim Jong Un.

A tactical surface-to-surface missile developed by South KoreaÕs Hanwha is displayed at the Seoul International Aerospace & Defense Exhibition in South Korea, October 15, 2019. Picture taken October 15, 2019. REUTERS/Josh Smith

All ballistic missile launches under the leadership of Kim Jong Il and Kim Jong Un.

South Korean soldiers rest next to self-propelled artillery vehicles during a military exercise near the demilitarized zone separating the two Koreas in Paju, South Korea, March 25, 2021. REUTERS/Kim Hong-Ji

South Korean soldiers work on self-propelled artillery vehicles during a military exercise near the demilitarized zone separating the two Koreas in Paju, South Korea, March 25, 2021. REUTERS/Kim Hong-Ji

A South Korean soldier sits on a self-propelled artillery vehicle during a military exercise near the demilitarized zone separating the two Koreas in Paju, South Korea, March 25, 2021. REUTERS/Kim Hong-Ji

Self-propelled artillery vehicles and armoured vehicles are pictured during a military exercise near the demilitarized zone separating the two Koreas in Paju, South Korea, March 25, 2021. REUTERS/Kim Hong-Ji

A couple looks toward the north at an observatory platform near the demilitarized zone separating the two Koreas in Paju, South Korea, March 24, 2021. REUTERS/Kim Hong-Ji

A man walks in front of a military fence near the demilitarized zone separating the two Koreas in Paju, South Korea, March 24, 2021. REUTERS/Kim Hong-Ji