Turkish gendarmes stand guard during an international service marking the 104th anniversary of the WWI battle of Gallipoli at the Turkish memorial in the Gallipoli peninsula in Canakkale, Turkey, April 24, 2019. REUTERS/Kemal Aslan 

New Zealand soldiers attend an international service marking the 104th anniversary of the WWI battle of Gallipoli at the Turkish memorial in the Gallipoli peninsula in Canakkale, Turkey, April 24, 2019. REUTERS/Kemal Aslan 

U.S. President Donald Trump speaks as he takes part in the commemoration ceremony for Armistice Day, 100 years after the end of World War One, at the Suresnes American Cemetery and Memorial in Paris, France, November 11, 2018. Reuters photographer Carlos Barria: "During a recent visit to France and just days after a gunman opened fire at a Pittsburgh synagogue, President Trump visited a WWI cemetery to honor American soldiers. As he spoke, I noted a gravestone at a side angle Ñ a single Star of David in the middle of rows and rows of crosses. I felt in this moment, the image carried more meaning than the words." REUTERS/Carlos Barria SEARCH "TRUMP POY" FOR FOR THIS STORY. SEARCH "REUTERS POY" FOR ALL BEST OF 2018 PACKAGES. TPX IMAGES OF THE DAY. 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

People look at poppy wreaths left around the Cenotaph after yesterday's remembrance ceremonies to mark the centenary of the end of World War 1, in London, Britain, November 12, 2018. REUTERS/Henry Nicholls 

A sand drawing of William Jonas as part of the Pages of the Sea WWI Centenary Art Commission to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas as part of the Pages of the Sea WWI Centenary Art Commission to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas as part of the Pages of the Sea WWI Centenary Art Commission to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A large-scale portrait of Major Charles Alan Smith Morris, the Bedfordshire Regiment, from Llandaff, Cardiff, who died aged 21 on 7 May 1917 is drawn in sand as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, on Freshwater West beach, Pembrokeshire, Wales November 11, 2018. REUTERS/Rebecca Naden 

A Greek military police officer walks past graves of fallen French soldiers at the Zeitenlik cemetery, a World War One Allied military cemetery in Thessaloniki, Greece, November 11, 2018. REUTERS/Alexandros Avramidis 

Graves of fallen Serbian soldiers are seen at the Zeitenlik cemetery, a World War One Allied military cemetery in Thessaloniki, Greece, November 11, 2018. REUTERS/Alexandros Avramidis 

Graves of fallen Italian soldiers are seen at the Zeitenlik cemetery, a World War One Allied military cemetery in Thessaloniki, Greece, November 11, 2018. REUTERS/Alexandros Avramidis 

A Greek military officer and his daughter walks past graves of fallen French soldiers at the Zeitenlik cemetery, a World War One Allied military cemetery in Thessaloniki, Greece, November 11, 2018. REUTERS/Alexandros Avramidis 

Flowers are left on the grave of a fallen Serbian soldier at the Zeitenlik cemetery, a World War One Allied military cemetery in Thessaloniki, Greece, November 11, 2018. REUTERS/Alexandros Avramidis 

Cemetery keeper of the Serbian sector Djordje Mihailovic, 90, makes his way at the Zeitenlik cemetery, a World War One Allied military cemetery in Thessaloniki, Greece, November 11, 2018. REUTERS/Alexandros Avramidis 

Graves of fallen Serbian soldiers are seen at the Zeitenlik cemetery, a World War One Allied military cemetery in Thessaloniki, Greece, November 11, 2018. REUTERS/Alexandros Avramidis 

Greek soldiers stand guard outside the Serbian cenotaph at the Zeitenlik cemetery, a World War One Allied military cemetery in Thessaloniki, Greece, November 11, 2018. REUTERS/Alexandros Avramidis 

People commemorate soldiers who fell during World War One and the Latvian freedom fights at the Brethren Cemetery in Riga, Latvia November 11, 2018. REUTERS/Ints Kalnins 

People commemorate soldiers who fell during World War One and the Latvian freedom fights at the Brethren Cemetery in Riga, Latvia November 11, 2018. REUTERS/Ints Kalnins 

People walk past tombs as they commemorate soldiers who fell during World War One and the Latvian freedom fights at the Brethren Cemetery in Riga, Latvia November 11, 2018. REUTERS/Ints Kalnins 

People look on wreaths to commemorate soldiers who fell during World War One and the Latvian freedom fights at the Brethren Cemetery in Riga, Latvia November 11, 2018. REUTERS/Ints Kalnins 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas, a soldier killed in action, as part of the Pages of the Sea WWI Centenary Art Commission, to mark one hundred years since Armistice Day, is seen on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas as part of the Pages of the Sea WWI Centenary Art Commission to mark one hundred years since Armistice Day, on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas as part of the Pages of the Sea WWI Centenary Art Commission to mark one hundred years since Armistice Day, on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

A sand drawing of William Jonas as part of the Pages of the Sea WWI Centenary Art Commission to mark one hundred years since Armistice Day, on the beach at Seahouses in Northumberland, Britain November 11, 2018. REUTERS/Lee Smith 

The Liberty Memorial is projected with 5,000 poppies and historic visuals at the National WWI Museum and Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

The Liberty Memorial is projected with 5,000 poppies at the National WWI Museum and Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

The Liberty Memorial is projected with 5,000 poppies at the National WWI Museum and Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

A visitor looks at the Liberty Memorial as it is projected with 5,000 poppies at the National WWI Museum and Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

Visitors view the more than 5,000 poppies projected on the facade of the Liberty Memorial at the National WWI Museum and Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

A cell phone camera captures the Liberty Memorial as it is projected with 5,000 poppies at the National WWI Museum and Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

The Liberty Memorial is projected with 5,000 poppies at the National WWI Museum and Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

Drivers circle the National WWI Museum and Memorial to view the more than 5,000 poppies projected on the Liberty Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

Drivers circle the National WWI Museum and Memorial to view the more than 5,000 poppies projected on the Liberty Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

Drivers circle the National WWI Museum and Memorial to view the more than 5,000 poppies projected on the Liberty Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup 

An eternal flame is seen from atop the Liberty Memorial as more than 5,000 poppies are projected on its facade at the National WWI Museum and Memorial in Kansas City, Missouri, U.S., November 9, 2018. REUTERS/Dave Kaup