Dr. P.A. Smithe was sent by the American Red Cross as a doctor and surgeon to work at a hospital in Vienna. He sailed to Europe in December 1915 and returned home in August 1916, according to his daughter, who donated his images to the National World War I Museum. Photo: Turkish army, including cavalry, infantry and artillery. (Photo by Dr. P.A. Smithe/National World War I Museum, Kansas City, Mo.)

A man holds a pigeon during the British Homing World show of the year at Blackpool's Winter Gardens in Blackpool, north west England on January 17, 2016. Homing pigeon fanciers from across Europe gathered to find the Supreme Show Champion with judges casting their eyes over hundreds of birds on show. The Royal Pigeon Racing Association organises the event and has Queen Elizabeth II, who keeps pigeons at Sandringham, as its patron. (Photo by Andrew Yates/Reuters)

A woman argues as Belarus police block a street during an opposition rally in Minsk, Belarus, Saturday, March 25, 2017. Over the past two months, protests have broken out across the country of 9.5 million, sometimes attracting thousands – initially they were focused on the labor law but have grown to encompass calls for the resignation of President Alexander Lukashenko, whom critics call Europe's last dictator. (Photo by Sergei Grits/AP Photo)

Stacked stones are pictured during the European Stone Stacking Championships 2018 in Dunbar, Scotland, on April 22, 2018. The European Stone Stacking Championships are Europe’s largest championships for all Stone Stacking and Rock Balancing artists and practitioners. The overall winner of the European Stone Stacking Championship will receive financial support for flights to the World Stone Balance Championship in Llano, Texas the following year. (Photo by Andy Buchanan/AFP Photo)

US President George W. Bush (R) and Russian President Vladimir Putin wave as the two presidents go for a ride in Putin's 1956 Volga before dinner 08 May 2005 at the his residence outside of Moscow. Bush hailed Russia's “bravery and sacrifice” in defeating Nazism, as he met Putin ahead of ceremonies marking the 60th anniversary of the end of World War II. Bush, who the previous day criticized the decades-long Soviet occupation of central Europe, said he was looking forward to the 09 May ceremony on Moscow's Red Square, to be attended by over 50 national leaders. (Photo by Tim Sloan/AFP Photo)

A couple passes the sculpture “Transformer” by Chinese artist Bi Heng during snowfall in Kassel, central Germany, Tuesday March 12, 2013. Frankfurt airport closed, a quarter of flights out of Paris were canceled, Belgium suffered record traffic jams and high-speed trains were stuck in stations – all because of a sudden dump of oddly late snowfall on Western Europe. Less prepared for the kind of heavy snow that regularly hits northern and eastern neighbors, France, Britain and Belgium struggled Tuesday to keep moving amid the frosty, blustery conditions. (Photo by Uwe Zucchi/AP Photo/Dpa)

The giant metal structure sits 330ft above the ground on the roof of a 22 storey office block in Dutch capital Amsterdam on September 6, 2016. Tourists sit in a playground-style chair as they propel themselves them over the edge of the building with only thin-air between them and the ground below. Engineers spent several years designing and building the breathtaking swing. By being fixed to the top of a building it reaches new heights – dwarfing other swings around Europe but trailing behind the 1,150ft high mechanical rides at the Stratosphere Hotel in Las Vegas, Nevada. (Photo by Huub Zeeman/SWNS.com)

A woman learns how to use an AK-47 assault rifle during a civilians self-defence course in the outskirts of Lviv, western Ukraine, on March 4, 2022. The Russian army occupied on March 4, 2022 the Ukrainian nuclear power plant of Zaporozhie (south), the largest in Europe, where bombings in the night have raised fears of a disaster as more than 1.2 million people have fled Ukraine into neighbouring countries since Russia launched its full-scale invasion on February 24, United Nations figures showed on March 4, 2022. (Photo by Daniel Leal/AFP Photo)