(FromL) Morocco's Prince Moulay Hassan, Moroccan King Mohammed VI, US President Donald Trump and his wife US First Lady Melania Trump, German Chancellor Angela Merkel, French President Emmanuel Macron and his wife Brigitte Macron, Russian President Vladimir Putin and Australian Governor-General Peter Cosgrove attend a ceremony at the Arc de Triomphe in Paris on November 11, 2018 AFP

Britain's Camilla, the Duchess of Cornwall, Queen Elizabeth II and Kate,the Duchess of Cambridge stand on a balcony during the remembrance service at the Cenotaph memorial in Whitehall, central London, on the 100th anniversary of the signing of the Armistice which marked the end of the First World War, in London, Sunday, Nov. 11, 2018 AP

Britain's Prime Minister Theresa May lays a pappy wreath at the Cenotaph during the Remembrance Sunday ceremony at the Cenotaph on Whitehall in central London, on November 11, 2018 AFP

French President Emmanuel Macron delivers his speech as he attends a commemoration ceremony for Armistice Day, 100 years after the end of the First World War at the Arc de Triomphe in Paris, France, Sunday, November 11, 2018 AP

Belgium's King Philippe attends a wreath laying ceremony at the Tomb of the Unknown Soldier during celebrations marking the 100th anniversary of the end of the First World War in Brussels, Belgium November 11, 2018 REUTERS

Israeli Prime Minister Benjamin Netanyahu (3rd L) and his wife Sara (4th L), Canadian Prime Minister Justin Trudeau (5th L) Moroccan King Mohammed VI (7th L) and his son Hassan, US First Lady Melania Trump (C), US President Donald Trump (6th R), German Chancellor Angela Merkel (5th R), French President's wife Brigitte Macron (4th R) and Russian President Vladimir Putin (3rd R) attend a ceremony at the Arc de Triomphe in Paris on November 11, 2018 AFP

People gather at a pacifist memorial at Gentioux-Pigerolles on November 11, 2018, as part of commemorations marking the 100th anniversary of the 11 November 1918 armistice, ending World War I AFP

US President Donald Trump shakes hands with German Chancellor Angela Merkel as French President Emmanuel Macron, 2nd left, and his wife Brigitte Macron welcome US First Lady Melania Trump, obscured, as they arrive to attend a ceremony at the Arc de Triomphe in Paris, Sunday, Nov. 11, 2018 AP

Enthusiasts in historical French and German military uniforms look at a mobile phone with a woman dressed as a medic, at a commemoration ceremony for Armistice Day, 100 years after the end of World War One, in Epernay, France, November 11, 2018 REUTERS

Russian President Vladimir Putin arrives to attend a commemoration ceremony for Armistice Day, 100 years after the end of the First World War at the Arc de Triomphe, in Paris, France, November 11, 2018 REUTERS

A local resident takes a picture of history enthusiasts dressed as German soldiers during a commemoration ceremony for Armistice Day, 100 years after the end of World War One, in Epernay, France, November 11, 2018 REUTERS

Twin sisters, Anne-Marie and Marie-Josephe look at World War One Historical Association members dressed as Piou Piou and Poilu (French soldiers from World War I) and U.S. soldier, during a parade for the centenary anniversary of the WW1 Armistice Day in Proville, France, November 11, 2018. REUTERS

Veterans gather on Whitehall to attend the Remembrance Sunday ceremony at the Cenotaph on Whitehall in central London, on November 11, 2018 AFP

History enthusiasts dressed as a German soldiers (foreground) attend a commemoration ceremony for Armistice Day, 100 years after the end of World War One, as a U.S. flag flies behind them, in Epernay, France, November 11, 2018. REUTERS

A history enthusiast dressed as a French soldier delivers a pigeon during a commemoration ceremony for Armistice Day, 100 years after the end of World War One, in Epernay, France, November 11, 2018. REUTERS

An Indian Army soldier carries a wreath before laying it at War Graves Cemetery during a ceremony to mark the centenary of the Armistice ending World War One, in Kolkata, India November 11, 2018. REUTERS

A woman walks back after laying a wreath at a Cenotaph during a ceremony to mark the centenary of the Armistice ending World War One, in Kolkata, India November 11, 2018. REUTERS

A visitor looks at a German Krupp 120mm fortress gun, on the day that marks the 100th anniversary of the end of World War I at the war museum in Beijing on November 11, 2018 AFP

Republican guards take part in a commemoration ceremony for Armistice Day, 100 years after the end of the First World War at the Arc de Triomphe, in Paris, France, November 11, 2018 REUTERS

Turkish President Recep Tayyip Erdogan (R) and his wife Emine Erdogan (2ndR) are welcomed by French President Emmanuel Macron (L) and his wife Brigitte Macron as they arrive at the Elysee Palace in Paris on November 11, 2018 AFP

Servicemen arrive to take part in a commemoration ceremony for Armistice Day, 100 years after the end of the First World War at the Arc de Triomphe, in Paris, France, November 11, 2018 REUTERS