A child plays near Russia-backed separatists in Donetsk, Ukraine, Monday. Separatists say they've begun to withdraw heavy weapons from the front line — a claim that monitors say they can't verify. Vadim Ghirda/AP hide caption

itoggle caption Vadim Ghirda/AP

On Sunday, thousands of people gathered in Maidan to mark the first anniversary of anti-government demonstrations that left scores of protesters dead. Geovien So/Barcroft Media/Landov hide caption

itoggle caption Geovien So/Barcroft Media/Landov

Ukrainian troops ride on self-propelled artillery near Artemivsk, eastern Ukraine, Monday. A Ukrainian military spokesman says that separatist attacks are delaying Ukrainian forces' pullback of heavy weapons from the front line. Evgeniy Maloletka/AP hide caption

itoggle caption Evgeniy Maloletka/AP

Britain's Foreign Secretary Philip Hammond and Secretary of State John Kerry deliver a statement at a news conference in London, today. Kerry said the two were going to discuss the possibility of further sanctions against Russia amid cease-fire violations in eastern Ukraine. Neil Hall/AP hide caption

itoggle caption Neil Hall/AP

In this photo provided by Britain's Royal Air Force, taken Oct. 29, 2014, a Russian military long-range bomber aircraft photographed by an intercepting RAF Typhoon flies in international airspace. Robyn Stewart/AP hide caption

itoggle caption Robyn Stewart/AP

Ukrainian soldiers repair their truck's bullet-shattered windshield Thursday, hit during their withdrawal from Debaltseve Wednesday. Brendan Hoffman/Getty Images hide caption

itoggle caption Brendan Hoffman/Getty Images

Ukrainian servicemen ride on a military vehicle as they leave the area of Debaltseve in eastern Ukraine Wednesday. The troops, some in columns, some in cars, began leaving the besieged town today. Gleb Garanich/Reuters /Landov hide caption

itoggle caption Gleb Garanich/Reuters /Landov

A Ukrainian military convoy stops on the road between the towns of Debaltseve and Artemivsk, Ukraine, on Saturday, hours before a cease-fire agreement is set to go into effect. Petr David Josek/AP hide caption

itoggle caption Petr David Josek/AP

A Ukrainian government soldier waves to an armored vehicle on a road near the town of Artemivsk, Ukraine, Friday. Fighting between Russia-backed separatists and Ukrainian government forces has continued despite the agreement reached by leaders of Russia, Ukraine, Germany and France in the Belarusian capital of Minsk Thursday. Petr David Josek/AP hide caption

itoggle caption Petr David Josek/AP

Russian President Vladimir Putin waves as he leaves a Ukrainian crisis peace summit in Minsk, Belarus. After hours of talks, Russia and Ukraine reached a deal for a cease-fire in eastern Ukraine. Tatyana Zenkovich/EPA/Landov hide caption

itoggle caption Tatyana Zenkovich/EPA/Landov

Russian soldiers guard the entrance to the Ukrainian military base in Perevalne, Crimea, last March. Russia was criticized widely internationally after seizing the region. Now Russian lawmakers are considering a bill that says Crimea was illegally given to Ukraine in 1954 and should have been part of Russia all along. Ivan Sekretarev/AP hide caption

itoggle caption Ivan Sekretarev/AP

People wait on a bus to leave the town of Debaltseve, Ukraine, on Friday to escape the heavy fighting. Nearly 1 million Ukrainians have been displaced by battles between pro-Russian insurgents and government troops. Petr David Josek/AP hide caption

itoggle caption Petr David Josek/AP

Secretary of State John Kerry shakes hands with Ukrainian President Petro Poroshenko in Kiev Thursday. The U.S. and its NATO allies are discussing how to help Ukraine maintain its borders against a separatist movement. Jim Watson/AFP/Getty Images hide caption

itoggle caption Jim Watson/AFP/Getty Images

Supreme Allied Commander Gen. Philip Breedlove attends a media conference at NATO headquarters in Brussels on Jan. 22. Breedlove told NPR on Thursday that "the conditions in eastern Ukraine have to change." Geert Vanden Wijngaert/AP hide caption

itoggle caption Geert Vanden Wijngaert/AP

Smoke rises above buildings after shelling in Donetsk, Ukraine, on Tuesday. The number of people who have been killed in the conflict in eastern Ukraine has climbed to 5,358, with the escalating violence claiming an average of 10 lives per day in the past few weeks, the U.N. says. Alexander Ermochenko /EPA /Landov hide caption

itoggle caption Alexander Ermochenko /EPA /Landov

A woman sits inside a bomb shelter in Donetsk on Wednesday. Some local residents have lived in bomb shelters and basements for more than a month, looking for cover from artillery strikes. Alexander Ermochenko/Xinhua/Landov hide caption

itoggle caption Alexander Ermochenko/Xinhua/Landov

Ukrainian military officer Nadezhda Savchenko speaks to journalists shortly after her capture in Luhansk, Ukraine, on June 19, 2014. She was apparently captured by pro-Russian insurgents during fighting in eastern Ukraine. But she is being held in Russia, which claims she was arrested in that country. Ukrainian officials say the separatists handed her over to Russia. Igor Golovniov/AP hide caption

itoggle caption Igor Golovniov/AP

Igor Girkin, a Russian citizen who headed the pro-Russian rebels in eastern Ukraine last year, walks with his bodyguards in the eastern Ukrainian city of Donetsk in July. Alexander Khudoteply/AFP/Getty Images hide caption

itoggle caption Alexander Khudoteply/AFP/Getty Images

President Vladimir Putin speaks in Moscow on Dec. 23. Russia's current economic crisis stems from Western sanctions and diving oil prices. Maxim Shipenkov/AFP/Getty Images hide caption

itoggle caption Maxim Shipenkov/AFP/Getty Images

Valentin Danilov, 83, is a former executive officer on a Soviet sub who proudly wears his old Soviet military uniform. Crimeans like Danilov have, without changing their residence, lived in three different countries in the past 25 years — the Soviet Union, then Ukraine and now Russia. Max Avdeev for NPR hide caption

itoggle caption Max Avdeev for NPR