Ukrainian servicemen ride in an armored vehicle, with Ukrainian and US flags and nationalist group Right Sector flag, near a destroyed car in Shyrokyne, eastern Ukraine, Wednesday, April 15, 2015. Russia and Ukraine agreed in Berlin on Monday to call for the pullback of smaller-caliber weapons from the front lines of the conflict that has claimed more than 6,000 lives. (AP Photo/Evgeniy Maloletka)





Local resident Lyudmila Shander takes her washing off the line in the village of Berdyanske near Shyrokyne, eastern Ukraine, Tuesday, April 14, 2015. Shyrokyne, a village on the Azov Sea that has been the epicenter of recent fighting, has changed hands repeatedly throughout the conflict. (AP Photo/Evgeniy Maloletka)





A Ukrainian serviceman guards positions in the village of Berdyanske near Shyrokyne, eastern Ukraine, Tuesday, April 14, 2015. Shyrokyne, a village on the Azov Sea that has been the epicenter of recent fighting, has changed hands repeatedly throughout the conflict. (AP Photo/Evgeniy Maloletka)





OSCE observers speak with a local woman while patrolling in the village of Shyrokyne, eastern Ukraine, Thursday, April 16, 2015. The sign in front reads Mir (Peace) Street. Shyrokyne, a village on the Azov Sea that has been the epicenter of recent fighting, has changed hands repeatedly throughout the conflict. (AP Photo/Evgeniy Maloletka)





A serviceman inspects a machine gun during a presentation of new samples of Ukrainian-made weapons for the Ukrainian Army at a military base in Novi Petrivtsi outside Kiev, Ukraine, Saturday, April 4, 2015. (AP Photo/Efrem Lukatsky)





Ukraine's President Petro Poroshenko (L) and Ukrainian secretary to the National Security and Defence Council Oleksandr Turchynov (3rd L) inspect weapons and military equipment as they visit the training center of the Ukrainian National Guard outside Kiev April 4, 2015. (Photo by Mykola Lazarenko/Reuters/Ukrainian Presidential Press Service)





A fighter with the separatist self-proclaimed Donetsk People's Republic Army stands guard at a checkpoint along a road from the town of Vuhlehirsk to Debaltseve in Ukraine, in this picture taken February 18, 2015. (Photo by Baz Ratner/Reuters)





Members of the armed forces of the separatist self-proclaimed Donetsk People's Republic drive a tank on the outskirts of Donetsk, Ukraine, in this January 22, 2015 file photo. (Photo by Alexander Ermochenko/Reuters)





A member of the armed forces of the separatist self-proclaimed Donetsk People's Republic walks near a building destroyed during battles with the Ukrainian armed forces in Vuhlehirsk, Donetsk region, Ukraine, in this February 4, 2015 file photo. (Photo by Maxim Shemetov/Reuters)





Ukrainian servicemen drink champagne after returning from the frontline in the eastern regions, at a railway station in Kiev, Ukraine, September 9, 2015. (Photo by Gleb Garanich/Reuters)





A Ukrainian serviceman carries his child after returning from the frontline in the eastern regions, as his relatives walk nearby, at a railway station in Kiev, Ukraine, September 9, 2015. (Photo by Gleb Garanich/Reuters)





A Ukrainian serviceman embraces his wife and child after returning from the frontline in the eastern regions, at a railway station in Kiev, Ukraine, September 9, 2015. (Photo by Gleb Garanich/Reuters)





A relative of a Ukrainian serviceman, who took part in fights with pro-Russian rebels in the eastern regions, runs along a train as he arrives at a railway station in Kiev, Ukraine, September 9, 2015. (Photo by Gleb Garanich/Reuters)





Ukrainian servicemen drink champagne after returning from the frontline in the Eastern regions, at a railway station in Kiev, Ukraine, September 9, 2015. (Photo by Gleb Garanich/Reuters)





A Ukrainian serviceman embraces his wife after returning from the frontline in the eastern regions, at a railway station in Kiev, Ukraine, September 9, 2015. (Photo by Gleb Garanich/Reuters)





A man eats his sandwich as he begs money near an underground passage in central Kiev, Ukraine, September 9, 2015. (Photo by Gleb Garanich/Reuters)





A Ukrainian serviceman embraces his wife after returning from the frontline in the eastern regions, at a railway station in Kiev, Ukraine, September 9, 2015. (Photo by Gleb Garanich/Reuters)





A girl is seen in a window as she holds a candle during a commemoration for Holodomor victims marking the 83rd anniversary of the famine of 1932-33 in which millions died of hunger, in Kiev, Ukraine, November 26, 2016. (Photo by Gleb Garanich/Reuters)





A woman waits for a bus at a bus stop near a currency exchange office in central Lviv, Ukraine, November 25, 2016. (Photo by Gleb Garanich/Reuters)





A street vendor selling paintings reads a newspaper while waiting for customers on a sidewalk in central Lviv, Ukraine, November 25, 2016. (Photo by Gleb Garanich/Reuters)





A man uses a mobile device as he rests in a cafe in central Lviv, Ukraine, November 24, 2016. (Photo by Gleb Garanich/Reuters)





A woman waits for customers as she sells flowers in central Lviv, Ukraine, November 24, 2016. (Photo by Gleb Garanich/Reuters)





A man dressed as the “Star Wars” character Darth Vader sits on a bench in central Lviv, Ukraine, November 24, 2016. (Photo by Gleb Garanich/Reuters)





People pass by in a tram in central Lviv, Ukraine, November 24, 2016. (Photo by Gleb Garanich/Reuters)





People rest in a cafe in central Lviv, Ukraine, November 24, 2016. (Photo by Gleb Garanich/Reuters)





People use their mobile devices as they stand in the street in central Kiev, Ukraine, November 30, 2016. (Photo by Gleb Garanich/Reuters)





Local resident Lyudmila Kuzina walks near a damaged Ukrainian APC in the village of Shyrokyne, eastern Ukraine, Thursday, April 16, 2015. Shyrokyne, a village on the Azov Sea that has been the epicenter of recent fighting, has changed hands repeatedly throughout the conflict. (AP Photo/Evgeniy Maloletka)





OSCE members prepare to carry a body of Ukrainian soldier killed on Saturday, April 18, near the village of Shyrokyne, eastern Ukraine, Sunday, April 19, 2015. Though fighting has diminished substantially since a February cease-fire deal was signed in Minsk, Belarus, clashes continue and each side accuses the other of wanting to resume the conflict.(AP Photo/Mstyslav Chernov)





An elderly woman sits in front of her damaged house in the village of Shyrokyne, eastern Ukraine, Thursday, April 16, 2015. Shyrokyne, a village on the Azov Sea that has been the epicenter of recent fighting, has changed hands repeatedly throughout the conflict. (AP Photo/Evgeniy Maloletka)





Pro-Russian separatists walk in a street patrolled by OSCE observers in the village of Shyrokyne, eastern Ukraine, Thursday, April 16, 2015. Shyrokyne, a village on the Azov Sea that has been the epicenter of recent fighting, has changed hands repeatedly throughout the conflict. (AP Photo/Evgeniy Maloletka)





A serviceman inspects a Ukrainian weapon systems installed on a British Saxon armored personnel carrier vehicle during a presentation of new samples of Ukrainian-made weapons for the Ukrainian Army at a military base in Novi Petrivtsi outside Kiev, Ukraine, Saturday, April 4, 2015. (Photo by Efrem Lukatsky/AP Photo)