Soviet troops are visible on an ageing Russian calendar on a wall in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. Wuensdorf, once called “The Forbidden City”, was the biggest base for the Soviet armed forces in communist East Germany from 1945 until the last Soviet troops left in the early 1990s following the end of the Cold War and the reunification of Germany. While Soviet troops pulled out of eastern Europe after 1989, Russian troops have in recent years intervened in Ukraine. The NATO military alliance has strengthened its presence in the Baltic states in an effort to prevent similar Russian intervention there. (Photo by Sean Gallup/Getty Images)





A swimming pool stands in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





A map of the world in Russian hangs over a desk in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





A text in Russian from Alexander Pushkin's poem “To Chadaev” reads: “My friend, to our land we dedicate the soul's exquisite raptures!” on a mural in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





A text in Russian from Alexander Pushkin's poem “To Chadaev” on a mural seen through a doorway in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





A seal in Russian reads: “Western Group of the Armed Forces” above the stage in the theater and cinema in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





A mosaic shows a young man and woman in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





A stairway stands in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





In this aerial view the officers' building and an auditorium stand at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





In this aerial view a statue of Vladimir Lenin stands overlooking a vista in front of the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





A mural decorates a Soviet-era auditorium at the officers' complex at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





A window look out onto a modern mural decorating an enclosed bridge between the officers' building and an auditorium at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





Soviet-made electronic equipment stands in a small room in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





In this aerial view a statue of Vladimir Lenin stands overlooking a vista in front of the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





Graffiti covers the entrance to the main theater and cinema at the officers' complex at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)





Curtains hang over the stage in the theater and cinema in the officers' building at the former Soviet military base on January 26, 2017 in Wuensdorf, Germany. (Photo by Sean Gallup/Getty Images)