Mexico's President Andres Manuel Lopez Obrador salutes as participants riding horses attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador looks on, next to his wife his wife Beatriz Gutierrez Muller and Secretary of Defense Luis Sandoval, as participants wearing period costumes attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Participants wearing period costumes attend the celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador looks on as participants wearing period costumes attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Participants wearing period costumes perform in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Participants wearing period costumes raise their hats and fists as Mexico's President Andres Manuel Lopez Obrador, his wife Beatriz Gutierrez Muller and Secretary of Defense Luis Sandoval attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador, his wife Beatriz Gutierrez Muller, Secretary of Defense Luis Sandoval and Secretary of the Navy Admiral Rafael Ojeda Duran attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico, November 20, 2019. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador and Secretary of Defense Luis Sandoval attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador and his wife Beatriz Gutierrez Muller arrive to attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador and Secretary of Defense Luis Sandoval attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador and his wife Beatriz Gutierrez Muller arrive to attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador, his wife Beatriz Gutierrez Muller and Secretary of Defense Luis Sandoval attend a military parade in celebration of the 110th anniversary of the Mexican Revolution, at the Monument to the Revolution, in Mexico City, Mexico November 20, 2019. REUTERS/Henry Romero

People light candles at the Velvet Revolution memorial to commemorate the 31st anniversary of the 1989 Velvet Revolution, as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

A man wears a Covid-19 costume as people protest against restrictions due to the coronavirus disease (COVID-19) during the commemoration of the 31st anniversary of the 1989 Velvet Revolution, in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

People light candles at the Velvet Revolution memorial to commemorate the 31st anniversary of the 1989 Velvet Revolution, as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

People light candles at the Velvet Revolution memorial to commemorate the 31st anniversary of the 1989 Velvet Revolution, as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

People light candles at the Velvet Revolution memorial to commemorate the 31st anniversary of the 1989 Velvet Revolution, as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

People light candles at the Velvet Revolution memorial to commemorate the 31st anniversary of the 1989 Velvet Revolution, as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

People protest against restrictions due to the coronavirus disease (COVID-19) during the commemoration of the 31st anniversary of the 1989 Velvet Revolution, in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

Children light candles at Wenceslas Square to commemorate the 31st anniversary of the 1989 Velvet Revolution, as people protest restrictions due to the spread of the coronavirus disease (COVID-19) in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

A man lights candles at Wenceslas Square to commemorate the 31st anniversary of the 1989 Velvet Revolution, as people protest restrictions due to the spread of the coronavirus disease (COVID-19) in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

People protest against restrictions due to the coronavirus disease (COVID-19) during the commemoration of the 31st anniversary of the 1989 Velvet Revolution, in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

People protest against restrictions due to the coronavirus disease (COVID-19) during the commemoration of the 31st anniversary of the 1989 Velvet Revolution, in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

People protest against restrictions due to the coronavirus disease (COVID-19) during the commemoration of the 31st anniversary of the 1989 Velvet Revolution, in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

A woman lights a candle at Wenceslas Square to commemorate the 31st anniversary of the 1989 Velvet Revolution, as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

A man lights candles at Wenceslas Square to commemorate the 31st anniversary of the 1989 Velvet Revolution, as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

A woman lights a candle at Wenceslas Square to commemorate the 31st anniversary of the 1989 Velvet Revolution, as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, November 17, 2020. REUTERS/David W Cerny

Leader of the Russian Communist Party Gennady Zyuganov (C) takes part in a procession marking the anniversary of the 1917 Bolshevik Revolution, also known as the Great October Socialist Revolution, in Red Square in Moscow, Russia November 7, 2020. REUTERS/Maxim Shemetov

A law enforcement officer is seen in front of St.Basil's Cathedral as supporters of the Russian Communist Party take part in a procession marking the anniversary of the 1917 Bolshevik Revolution, also known as the Great October Socialist Revolution, in Red Square in Moscow, Russia November 7, 2020. REUTERS/Maxim Shemetov

A Soviet flag flies in front of St.Basil's Cathedral as supporters of the Russian Communist Party take part in a procession marking the anniversary of the 1917 Bolshevik Revolution, also known as the Great October Socialist Revolution, in Red Square in Moscow, Russia November 7, 2020. REUTERS/Maxim Shemetov

A supporter of the Russian Communist Party holds a portrait of Soviet leader Joseph Stalin during a procession marking the anniversary of the 1917 Bolshevik Revolution, also known as the Great October Socialist Revolution, in Red Square in Moscow, Russia November 7, 2020. REUTERS/Maxim Shemetov

Supporters of the Russian Communist Party take part in a procession marking the anniversary of the 1917 Bolshevik Revolution, also known as the Great October Socialist Revolution, in Red Square in Moscow, Russia November 7, 2020. REUTERS/Maxim Shemetov

Supporters of the Russian Communist Party take part in a procession marking the anniversary of the 1917 Bolshevik Revolution, also known as the Great October Socialist Revolution, in Red Square in Moscow, Russia November 7, 2020. REUTERS/Maxim Shemetov TPX IMAGES OF THE DAY

Supporters of the Russian Communist Party take part in a procession marking the anniversary of the 1917 Bolshevik Revolution, also known as the Great October Socialist Revolution, in Red Square in Moscow, Russia November 7, 2020. REUTERS/Maxim Shemetov

A protester holds a "Free Hong Kong revolution" flag during a rally calling China to release 12 Hong Kong people arrested at sea by mainland authorities, in Taipei, Taiwan, October 25, 2020. REUTERS/Ann Wang

People gather near a metal sculpture spelling out the word "revolution" topped by flames during a demonstration marking one year since the start of nation-wide protests near Beirut's port, Lebanon October 17, 2020. REUTERS/Emma Freiha

Anti-government demonstrators take pictures of a metal sculpture spelling out the word "revolution" topped by flames during a protest as Lebanese mark one year since the start of nation-wide protests, near Beirut's port, Lebanon October 17, 2020. REUTERS/Mohamed Azakir

Anti-government demonstrators take pictures of a metal sculpture spelling out the word "revolution" topped by flames during a protest as Lebanese mark one year since the start of nation-wide protests, near Beirut's port, Lebanon October 17, 2020. REUTERS/Mohamed Azakir

Anti-government demonstrators take pictures of a metal sculpture spelling out the word "revolution" topped by flames during a protest as Lebanese mark one year since the start of nation-wide protests, near Beirut's port, Lebanon October 17, 2020. REUTERS/Mohamed Azakir TPX IMAGES OF THE DAY

Supporters of the Free German Youth (FDJ), formerly the official youth movement of the German Democratic Republic (GDR) and the East German Communist Party SED hold their flags during a demonstration "30 years are enough - revolution and socialism" in Berlin, Germany, October 3, 2020, as the country celebrates the 30th anniversary of the German reunification. REUTERS/Joachim Herrmann

Supporters of the Free German Youth (FDJ), formerly the official youth movement of the German Democratic Republic (GDR) and the East German Communist Party SED hold their flags during a demonstration "30 years are enough - revolution and socialism" in Berlin, Germany, October 3, 2020, as the country celebrates the 30th anniversary of the German reunification. REUTERS/Joachim Herrmann

Supporters of the Free German Youth (FDJ), formerly the official youth movement of the German Democratic Republic (GDR) and the East German Communist Party SED hold their flags during a demonstration "30 years are enough - revolution and socialism" in Berlin, Germany, October 3, 2020, as the country celebrates the 30th anniversary of the German reunification. REUTERS/Joachim Herrmann

A supporter of the Free German Youth (FDJ), formerly the official youth movement of the German Democratic Republic (GDR) and the East German Communist Party SED, carries a GDR flag during a demonstration with the slogan "30 years are enough - revolution and socialism" in Berlin, Germany, October 3, 2020, as the country celebrates the 30th anniversary of the German reunification. REUTERS/Joachim Herrmann

People line up to buy food under a picture of late Cuban President Fidel Castro set up for the celebrations of the 60th anniversary of the Committees for the Defense of the Revolution (CDR), amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, September 28, 2020. Picture taken on September 28, 2020. REUTERS/Alexandre Meneghini

A demonstrator holding a sign reading "Nothing is absolute, everything is change, everything is movement, everything is revolut" takes part in a rally organized by workers of Belgian public health amid the coronavirus disease (COVID-19) outbreak, in central Brussels, Belgium September 13, 2020. REUTERS/Johanna Geron

Cycling - Tour de France - Stage 12 - Chauvigny to Sarran Correze - France - September 10, 2020. People hold a banner along the course. The banner reads "So, who was right? We are waiting for you for the revolution". REUTERS/Benoit Tessier

A pro-democracy activist stands near a screen projecting images from the 1932 revolution during a demonstration to demand for change in the constitution on the 88th anniversary of a revolt that ended absolute monarchy in the country, at Democracy monument in Bangkok, Thailand, June 24, 2020. REUTERS/Athit Perawongmetha

Police officers stand guard as images from the 1932 revolution are projected during a demonstration to demand for change in the constitution on the 88th anniversary of a revolt that ended absolute monarchy in the country, at Democracy monument in Bangkok, Thailand, June 24, 2020. REUTERS/Athit Perawongmetha

A pro-democracy activist holds a picture of the original plaque from the 1932 revolution during a demonstration to demand for change in the constitution on the 88th anniversary of a revolt that ended absolute monarchy in the country, at Democracy monument in Bangkok, Thailand, June 24, 2020. REUTERS/Athit Perawongmetha

A demonstrator wears an Guy Fawkes mask during a protest among a series of ongoing demonstrations calling for dignified life, amidst an outbreak of the coronavirus disease (COVID19), in Bogota, Colombia June 15, 2020. The banner reads "Revolution". REUTERS/Luisa Gonzalez

A pro-democracy demonstrator holds a banner "Librate Hong Kong, Revolution of out Time" during a protest to mark the first anniversary of a mass rally against the now-withdrawn extradition bill, in Hong Kong, China June 9, 2020. REUTERS/Tyrone Siu

Gabor Czaban, 36-year-old, also known as DJ Revolution works as a food delivery truck driver for a supermaket chain during the global coronavirus disease (COVID-19) outbreak, in Budapest, Hungary, May 27, 2020. Picture taken May 27, 2020. REUTERS/Bernadett Szabo

Gabor Czaban, 36-year-old, also known as DJ Revolution performs in an empty music club during the global coronavirus disease (COVID-19) outbreak, in Budapest, Hungary, May 29, 2020. Picture taken May 29, 2020. REUTERS/Bernadett Szabo

Gabor Czaban, 36-year-old, also known as DJ Revolution performs in an empty music club during the global coronavirus disease (COVID-19) outbreak, in Budapest, Hungary, May 29, 2020. Picture taken May 29, 2020. REUTERS/Bernadett Szabo

Gabor Czaban, 36-year-old, also known as DJ Revolution poses for a picture during the global coronavirus disease (COVID-19) outbreak, in Budapest, Hungary, May 27, 2020. Picture taken May 27, 2020. REUTERS/Bernadett Szabo

Visitors wearing masks, following the novel coronavirus outbreak, visit the Military Museum of the Chinese People's Revolution in Beijing, China May 26, 2020. REUTERS/Tingshu Wang

Visitors wearing masks, following the novel coronavirus outbreak, visit the Military Museum of the Chinese People's Revolution in Beijing, China May 26, 2020. REUTERS/Tingshu Wang

Visitors wearing masks, following the novel coronavirus outbreak, visit the Military Museum of the Chinese People's Revolution in Beijing, China May 26, 2020. REUTERS/Tingshu Wang

Visitors watch video footage of Chinese President Xi Jinping reviewing the troops during the military parade marking the 70th founding anniversary of People's Republic of China on October 1, 2019, at the Military Museum of the Chinese People's Revolution in Beijing, China May 26, 2020. REUTERS/Tingshu Wang

Visitors watch video footage of Chinese People's Liberation Army (PLA) soldiers marching during the military parade marking the 70th founding anniversary of People's Republic of China on October 1, 2019, at the Military Museum of the Chinese People's Revolution in Beijing, China May 26, 2020. REUTERS/Tingshu Wang