Photos: World leaders meet at G20 summit in Argentina President of Argentina Mauricio Macri speaks to the press as US President Donald Trump holds his translation device before during a meeting between the presidents of Argentina and United States ahead of Argentina G20 Leaders' Summit 2018 at Casa Rosada on November 30, 2018 in Buenos Aires, Argentina.Photo by: Ricardo Ceppi Photos: World leaders meet at G20 summit in Argentina British Prime Minister Theresa May (First row; 4L-R), U.S. President Donald Trump (First row; 6L-R) and other leaders of G20 pose for the family picture during the opening day of Argentina G20 Leaders' Summit 2018 at Costa Salguero on November 30, 2018 in Buenos Aires, Argentina. Photo by: Daniel Jayo Photos: World leaders meet at G20 summit in Argentina Members of the military stand guard during the opening day of Argentina G20 Leaders' Summit 2018 at Costa Salguero on November 30, 2018 in Buenos Aires, Argentina. Photo by: Amilcar Orfali Photos: World leaders meet at G20 summit in Argentina President of Argentina Mauricio Macri welcomes President of France Emmanuel Macron upon his arrival during the opening day of Argentina G20 Leaders' Summit 2018 at Costa Salguero on November 30, 2018 in Buenos Aires, Argentina. Photo by: Daniel Jayo Photos: World leaders meet at G20 summit in Argentina President of the People's Republic of China Xi Jinping (L) arrives to the opening day of Argentina G20 Leaders' Summit 2018 at Costa Salguero on November 30, 2018 in Buenos Aires, Argentina. Photo by: Daniel Jayo Photos: World leaders meet at G20 summit in Argentina President of Argentina Mauricio Macri greets Canadian Prime Minister Justin Trudeau upon his arrival to the opening day of Argentina G20 Leaders' Summit 2018 at Costa Salguero on November 30, 2018 in Buenos Aires, Argentina. Photo by: Daniel Jayo Photos: World leaders meet at G20 summit in Argentina Police officers check a suspicious package on the first day of the Argentina G20 Leaders’ Summit 2018 at Plaza de Mayo on November 30, 2018 in Buenos Aires, Argentina. Over 24,000 police officers and security agents work on the G20 which gathers the leaders of the top 20 industrialized nations of the world during a two day meeting on November 30th and December 1st. Photo by: Ricardo Ceppi Photos: World leaders meet at G20 summit in Argentina A police car patrols the area of Casa Rosada on the day before the beginning of Argentina G20 Leaders’ Summit 2018 on November 29, 2018 in Buenos Aires, Argentina. Over 24,000 police officers and security agents work on the G20 which gathers the leaders of the top 20 industrialized nations of the world during a two day meeting on November 30th and December 1st. Photo by: Paula Ribas Photos: World leaders meet at G20 summit in Argentina BUENOS AIRES, ARGENTINA - NOVEMBER 30: President of Argentina Mauricio Macri greets Crown Prince of Saudi Arabia Mohammad bin Salman al-Saud upon his arrival to the opening day of Argentina G20 Leaders' Summit 2018 at Costa Salguero on November 30, 2018 in Buenos Aires, Argentina. Photo by: Daniel Jayo Photos: World leaders meet at G20 summit in Argentina Police officers check a suspicious package on the first day of the Argentina G20 Leaders’ Summit 2018 at Plaza de Mayo on November 30, 2018 in Buenos Aires, Argentina. Over 24,000 police officers and security agents work on the G20 which gathers the leaders of the top 20 industrialized nations of the world during a two day meeting on November 30th and December 1st. Photo by: Ricardo Ceppi Photos: World leaders meet at G20 summit in Argentina Prime Minister of Japan Shinzo Abe and his wife Akie Abe arrive to Buenos Aires for G20 Leaders' Summit 2018 at Ministro Pistarini International Airport on November 29, 2018 in Ezeiza, Buenos Aires, Argentina. Leaders of the G20 group of nations are meeting for the November 30th - December 1st summit. Photo by: Amilcar Orfali