A couple looks on at anti-war activists taking part in a protest calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022 REUTERS/Kim Hong-Ji 

An anti-war activist carries a cut-out of U.S. President Joe Biden during a protest calling for peace on the Korean peninsula during his visit to South Korea, in Seoul, South Korea, May 20, 2022 REUTERS/Kim Hong-Ji 

Anti-war activists hold banners during a protest calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022 REUTERS/Kim Hong-Ji 

An anti-war activists rests in the shade during a protest calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022 REUTERS/Kim Hong-Ji 

An anti-war activist holds a cut-out of U.S. President Joe Biden during a protest calling for peace on the Korean peninsula during his visit to South Korea, in Seoul, South Korea, May 20, 2022 REUTERS/Kim Hong-Ji 

A cut-out of U.S. President Joe Biden is seen next to anti-war activists taking part in a protest calling for peace on the Korean peninsula during his visit to South Korea, in Seoul, South Korea, May 20, 2022 REUTERS/Kim Hong-Ji 

Anti-war activists hold banners during a protest calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022 REUTERS/Kim Hong-Ji 

Anti-war activists hold a candlelight vigil calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022. REUTERS/Kim Hong-Ji 

Anti-war activists hold a candlelight vigil calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022. REUTERS/Kim Hong-Ji 

A child looks on during a candlelight vigil calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022. REUTERS/Kim Hong-Ji 

Anti-war activists hold signs as they take part in a candlelight vigil calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022. REUTERS/Kim Hong-Ji 

Anti-war activists hold a candlelight vigil calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022. REUTERS/Kim Hong-Ji 

An anti-war activist takes part in a candlelight vigil calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, South Korea, May 20, 2022. REUTERS/Kim Hong-Ji 

Anti-war activists hold a candlelight vigil calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, May 20, 2022. REUTERS/Kim Hong-Ji 

Anti-war activists hold a candlelight vigil calling for peace on the Korean peninsula during U.S. President Joe Biden's visit to South Korea, in Seoul, May 20, 2022. REUTERS/Kim Hong-Ji 

Kim Gwang-ho, a former Hyundai Motor engineer, poses with a presidential certificate recognizing his anti-corruption work at his home in Seoul, South Korea, November 12, 2021. REUTERS/ Heo Ran 

South Korea's special tactic team members take part in an anti-terror drill to prepare against drone terror attacks at Jamsil Sport Complex in Seoul, South Korea, June 29, 2021. REUTERS/Kim Hong-ji 

South Korea's special tactic team members take part in an anti-terror drill to prepare against drone terror attacks at Jamsil Sport Complex in Seoul, South Korea, June 29, 2021. REUTERS/Kim Hong-ji 

South Korea's special tactic team members take part in an anti-terror drill to prepare against drone terror attacks at Jamsil Sport Complex in Seoul, South Korea, June 29, 2021. REUTERS/Kim Hong-ji 

South Korea's soldiers and firefighters wearing protective gear take part in an anti-terror drill to prepare against drone terror attacks at Jamsil Sport Complex in Seoul, South Korea, June 29, 2021. REUTERS/Kim Hong-ji 

South Korea's soldiers and firefighters wearing protective gear take part in an anti-terror drill to prepare against drone terror attacks at Jamsil Sport Complex in Seoul, South Korea, June 29, 2021. REUTERS/Kim Hong-ji 

An officer prepares to use a drone jamming device during an anti-terror drill to prepare against drone terror attacks at Jamsil Sport Complex in Seoul, South Korea, June 29, 2021. REUTERS/Kim Hong-ji 

A mock bomb is placed in a vehicle as officers take part in an anti-terror drill to prepare against drone terror attacks at Jamsil Sport Complex in Seoul, South Korea, June 29, 2021. REUTERS/Kim Hong-ji 

An officer prepares to use a drone jamming device during an anti-terror drill to prepare against drone terror attacks at Jamsil Sport Complex in Seoul, South Korea, June 29, 2021. REUTERS/Kim Hong-ji 

Police buses are parked surrounding the Gwanghwamun square to prevent unexpected anti-government protests amid the coronavirus disease (COVID-19) pandemic in central Seoul, South Korea, October 3, 2020. REUTERS/Heo Ran 

Pedestrians walk past police buses that are parked surrounding the Gwanghwamun square to prevent unexpected anti-government protests amid the coronavirus disease (COVID-19) pandemic in central Seoul, South Korea, October 3, 2020. REUTERS/Heo Ran 

Police buses are parked surrounding the Gwanghwamun square to prevent unexpected anti-government protests amid the coronavirus disease (COVID-19) pandemic in central Seoul, South Korea, October 3, 2020. REUTERS/Heo Ran 

Police buses are parked surrounding the Gwanghwamun square to prevent unexpected anti-government protests amid the coronavirus disease (COVID-19) pandemic in central Seoul, South Korea, October 3, 2020. REUTERS/Heo Ran 

Police buses are parked surrounding the Gwanghwamun square to prevent unexpected anti-government protests amid the coronavirus disease (COVID-19) pandemic in central Seoul, South Korea, October 3, 2020. REUTERS/Heo Ran 

South Korean police stand guard near police buses, parked surrounding the Gwanghwamun square, to prevent unexpected anti-government protests amid the coronavirus disease (COVID-19) pandemic in central Seoul, South Korea, October 3, 2020. REUTERS/Heo Ran 

South Korean police stand guard near the Gwanghwamun square to prevent unexpected anti-government protests amid the coronavirus disease (COVID-19) pandemic in central Seoul, South Korea, October 3, 2020. REUTERS/Heo Ran 

South Korean police stand guard near police buses that are parked surrounding the Gwanghwamun square to prevent unexpected anti-government protests amid the coronavirus disease (COVID-19) pandemic in central Seoul, South Korea, October 3, 2020. REUTERS/Heo Ran 

Security personnel stand at an entrance surrounded by members of conservative civic groups taking part in an anti-government protest, as concerns over a fresh wave of the coronavirus disease (COVID-19) cases grow, in central Seoul, South Korea, August 15, 2020. REUTERS/Kim Hong-Ji 

A woman wearing a mask walks past members of conservative civic groups who take part in an anti-government protest, as concerns over a fresh wave of the coronavirus disease (COVID-19) cases grow, in central Seoul, South Korea, August 15, 2020. REUTERS/Kim Hong-Ji 

Members of conservative civic groups take part in an anti-government protest as concerns over a fresh wave of the coronavirus disease (COVID-19) cases grow, in central Seoul, South Korea, August 15, 2020. REUTERS/Kim Hong-Ji 

Members of conservative civic groups attack an ambulance during an anti-government protest, as concerns over a fresh wave of the coronavirus disease (COVID-19) cases grow, in central Seoul, South Korea, August 15, 2020. REUTERS/Kim Hong-Ji 

Members of conservative civic groups take part in an anti-government protest, as concerns over a fresh wave of the coronavirus disease (COVID-19) cases grow, in central Seoul, South Korea, August 15, 2020. REUTERS/Kim Hong-Ji 

Members of conservative civic groups march down a street during an anti-government protest, as concerns over a fresh wave of the coronavirus disease (COVID-19) cases grow, in central Seoul, South Korea, August 15, 2020. REUTERS/Kim Hong-Ji 

Members of conservative civic groups take part in an anti-government protest, as concerns over a fresh wave of the coronavirus disease (COVID-19) cases grow, in central Seoul, South Korea, August 15, 2020. REUTERS/Kim Hong-Ji 

Members of conservative civic groups take part in an anti-government protest, as concerns over a fresh wave of the coronavirus disease (COVID-19) cases grow, in central Seoul, South Korea, August 15, 2020. REUTERS/Kim Hong-Ji 

Howard X, an Australian-Chinese impersonating North Korean leader Kim Jong-un walks near riot police as officers clear the crowd in a mall to avoid the spread of the coronavirus disease (COVID-19) during an anti-government protest in Hong Kong, China April 28, 2020. REUTERS/Tyrone Siu 

Howard X, an Australian-Chinese impersonating North Korean leader Kim Jong-un walks near riot police as officers clear the crowd in a mall to avoid the spread of the coronavirus disease (COVID-19) during an anti-government protest in Hong Kong, China April 28, 2020. REUTERS/Tyrone Siu 

Howard X, an Australian-Chinese impersonating North Korean leader Kim Jong-un wearing face masks to avoid the spread of the coronavirus disease (COVID-19) is pictured during an anti-government protest in Hong Kong, China April 28, 2020. REUTERS/Tyrone Siu 

Howard X, an Australian-Chinese impersonating North Korean leader Kim Jong-un wearing face masks to avoid the spread of the coronavirus disease (COVID-19) is seen during an anti-government protest in Hong Kong, China April 28, 2020. REUTERS/Tyrone Siu TPX IMAGES OF THE DAY 

Howard X, an Australian-Chinese impersonating North Korean leader Kim Jong-un walks near riot police as officers clear the crowd in a mall to avoid the spread of the coronavirus disease (COVID-19) during an anti-government protest in Hong Kong, China April 28, 2020. REUTERS/Tyrone Siu 

Anti-war activists stage a die-in during a rally against U.S. President Donald Trump in front of the U.S. embassy in Seoul, South Korea, January 10, 2020. REUTERS/Kim Hong-Ji 

Anti-war activists attend a rally against U.S. President Donald Trump in front of the U.S. embassy in Seoul, South Korea, January 10, 2020. REUTERS/Kim Hong-Ji 

Anti-war activists attend a rally against U.S. President Donald Trump in front of the U.S. embassy in Seoul, South Korea, January 10, 2020. REUTERS/Kim Hong-Ji 

Anti-war activists attend a rally against U.S. President Donald Trump in front of the U.S. embassy in Seoul, South Korea, January 10, 2020. REUTERS/Kim Hong-Ji 

Anti-war activists stage a die-in during a rally against U.S. President Donald Trump in front of the U.S. embassy in Seoul, South Korea, January 10, 2020. REUTERS/Kim Hong-Ji 

Members of a pro-U.S. civic group argue with police officers as they try to cut off the head of an effigy of North Korean leader Kim Jong Un, during an anti-North Korea protest in front of the U.S. embassy in Seoul, South Korea, December 13, 2019. REUTERS/Kim Hong-Ji 

An effigy of North Korean leader Kim Jong Un is surrounded by police officers during an anti-North Korea protest in front of the U.S. embassy in Seoul, South Korea, December 13, 2019. REUTERS/Kim Hong-Ji 

An effigy of North Korean leader Kim Jong Un is surrounded by police officers during an anti-North Korea protest in front of the U.S. embassy in Seoul, South Korea, December 13, 2019. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY 

Members of a pro-U.S. civic group argue with police officers as they try to cut off the head of an eiffigy of North Korean leader Kim Jong Un, during an anti-North Korea protest in front of the U.S. embassy in Seoul, South Korea, December 13, 2019. REUTERS/Kim Hong-Ji 

A man walks past a soldier during an anti-terrorism drill in Seoul, South Korea, October 29, 2019. REUTERS/Kim Hong-Ji 

People take part in an anti-terrorism drill in Seoul, South Korea, October 29, 2019. REUTERS/Kim Hong-Ji 

People take part in an anti-terrorism drill in Seoul, South Korea, October 29, 2019. REUTERS/Kim Hong-Ji 

People take part in an anti-terrorism drill in Seoul, South Korea, October 29, 2019. REUTERS/Kim Hong-Ji 

A South Korean soldier takes part in an anti-terrorism drill as onlookers watch in Seoul, South Korea, October 29, 2019. REUTERS/Kim Hong-Ji 

People take part in an anti-terrorism drill in Seoul, South Korea, October 29, 2019. REUTERS/Kim Hong-Ji