France's President Francois Hollande (L) takes part in a welcoming ceremony upon his arrival at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

France's President Francois Hollande walks out of a plane upon his arrival at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

Germany's Chancellor Angela Merkel walks down the stairs upon her arrival at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

France's President Francois Hollande (L) reacts as he takes part in a welcoming ceremony upon his arrival at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

France's President Francois Hollande takes part in a welcoming ceremony upon his arrival at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

France's President Francois Hollande (R) and Foreign Minister Laurent Fabius (2nd L) take part in a welcoming ceremony upon their arrival at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

Germany's Chancellor Angela Merkel (front) walks out of a plane upon her arrival at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

Russian President Vladimir Putin (2R) walks past soldiers from the guard of honour during a welcoming ceremony at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

Germany's Chancellor Angela Merkel (L) and France's President Francois Hollande walk out after a meeting inside a plane at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

Germany's Chancellor Angela Merkel (C) and France's President Francois Hollande (R) walk out after a meeting inside a plane at an airport near Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

Aircrafts, carrying Germany's Chancellor Angela Merkel (back) and France's President Francois Hollande, are seen upon the arrival at an airport near Minsk, February 11, 2015. (Photo by Maxim Shipenkov/Reuters)

Belarus' President Alexander Lukashenko (R) welcomes Germany's Chancellor Angela Merkel during a meeting in Minsk, February 11, 2015. (Photo by Vasily Fedosenko/Reuters)

Russia's President Vladimir Putin (L), Ukraine's President Petro Poroshenko (R), Germany's Chancellor Angela Merkel (2nd R) and France's President Francois Hollande attend a meeting on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Mykola Lazarenko/Reuters)

Russia's President Vladimir Putin (2nd L), Ukraine's President Petro Poroshenko (R), Germany's Chancellor Angela Merkel (4th R) and France's President Francois Hollande (3rd R) attend a meeting on resolving the Ukrainian crisis, with Belarus' President Alexander Lukashenko (L) seen nearby, in Minsk, February 11, 2015. (Photo by Mykola Lazarenko/Reuters)

Russia's President Vladimir Putin (L), shakes hands with Germany's Chancellor Angela Merkel as France's President Francois Hollande stands nearby during a meeting on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Mykola Lazarenko/Reuters)

Germany's Chancellor Angela Merkel and France's President Francois Hollande attend a meeting on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Mykola Lazarenko/Reuters)

Russia's President Vladimir Putin (2nd L), Germany's Chancellor Angela Merkel (2nd R) and France's President Francois Hollande (R) attend a meeting on resolving the Ukrainian crisis, with Belarus' President Alexander Lukashenko (L) seen nearby, in Minsk, February 11, 2015. (Photo by Mykola Lazarenko/Reuters)

Russia's President Vladimir Putin (L) talks to Belarus' President Alexander Lukashenko before a meeting on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Mykola Lazarenko/Reuters)

Russia's President Vladimir Putin (L) reacts as he talks to Belarus' President Alexander Lukashenko before a meeting on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Mykola Lazarenko/Reuters)

Russia's President Vladimir Putin (L) and Belarus' President Alexander Lukashenko laugh while walking before a meeting on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Mykola Lazarenko/Reuters)

German Chancellor Angela Merkel walks with French President Francois Hollande (covered), Ukraininan President Petro Poroshenko, followed by Belarussian President Alexander Lukashenko and Russian President Vladimir Putin (L-R) after a meeting in Minsk, February 11, 2015. (Photo by Grigory Dukor/Reuters)

Russian President Vladimir Putin, French President Francois Hollande, Ukraininan President Petro Poroshenko (covered), German Chancellor Angela Merkel and Belarussian President Alexander Lukashenko (L-R) walk after a meeting in Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

Ukrainian President Petro Poroshenko, left, is followed by Russian President Vladimir Putin, right, and Belarusian President Alexander Lukashenko, heading for a broader meeting involving senior officials in Minsk, Belarus, Wednesday, February 11, 2015. (Photo by Sergei Grits/AP Photo)

French President Francois Hollande and Russian President Vladimir Putin (R) walk after a meeting in Minsk, February 11, 2015. (Photo by Grigory Dukor/Reuters)

Ukraine's President Petro Poroshenko (R) talks to Germany's Chancellor Angela Merkel as they take part in peace talks on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Mykhailo Palinchak/Reuters)

German Chancellor Angela Merkel and Ukrainian President Petro Poroshenko talk in Minsk, Belarus, Wednesday, February 11, 2015. (Photo by Mykhailo Palinchak/AP Photo)

Russian President Vladimir Putin, French President Francois Hollande, Ukraininan President Petro Poroshenko, German Chancellor Angela Merkel and Belarussian President Alexander Lukashenko (L-R) walk after a meeting in Minsk, February 11, 2015. (Photo by Valentyn Ogirenko/Reuters)

France's President Francois Hollande takes part in peace talks on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Kirill Kudryavtsev/Reuters)

Ukraine's President Petro Poroshenko yawns as he takes part in peace talks on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Kirill Kudryavtsev/Reuters)

Ukraine's President Petro Poroshenko takes part in peace talks on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Kirill Kudryavtsev/Reuters)

Ukraine's President Petro Poroshenko (L) and Germany's Chancellor Angela Merkel take part in peace talks on resolving the Ukrainian crisis in Minsk, February 11, 2015. (Photo by Kirill Kudryavtsev/Reuters)

Russia's President Vladimir Putin takes part in peace talks on resolving the Ukrainian crisis, with his French counterpart Francois Hollande seen in the background, in Minsk, February 11, 2015. (Photo by Kirill Kudryavtsev/Reuters)

Belarus' President Alexander Lukashenko (back) and his Russian counterpart Vladimir Putin walk during peace talks in Minsk, February 11, 2015. (Photo by Vasily Fedosenko/Reuters)

Belarus' President Alexander Lukashenko (R) meets with his Russian counterpart Vladimir Putin during peace talks in Minsk, February 11, 2015. (Photo by Alexei Druzhinin/Reuters/RIA Novosti/Kremlin)

Belarus' President Alexander Lukashenko (R) meets with his Russian counterpart Vladimir Putin during peace talks in Minsk, February 11, 2015. (Photo by Alexei Druzhinin/Reuters/RIA Novosti/Kremlin)

Belarus' President Alexander Lukashenko, right, and Ukraine's President Petro Poroshenko enter a hall in Minsk, Belarus, Wednesday, February 11, 2015. (Photo by Mykhailo Palinchak/AP Photo)

Left to right, Russian President Vladimir Putin, French President Francois Hollande, German Chancellor Angela Merkel, and Ukrainian President Petro Poroshenko talk in Minsk, Belarus, Wednesday, February 11, 2015. (Photo by Mykola Lazarenko/AP Photo)

Ukraine's President Petro Poroshenko (C) looks on as he attends a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Grigory Dukor/Reuters)

Ukraine's President Petro Poroshenko (R) looks on as he attends a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Grigory Dukor/Reuters)

Russia's President Vladimir Putin (L) walks as he attends a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Vasily Fedosenko/Reuters)

Ukraine's President Petro Poroshenko (R) looks on as he attends a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Grigory Dukor/Reuters)

Russia's Foreign Minister Sergei Lavrov (R) walks as he attends a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Vasily Fedosenko/Reuters)

Germany's Chancellor Angela Merkel (R) and France's President Francois Hollande (L, front) walk as they attend a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Vasily Fedosenko/Reuters)

Russia's President Vladimir Putin (C) uses an elevator as he attends a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Vasily Fedosenko/Reuters)

Russia's President Vladimir Putin (2nd R) uses an elevator as he attends a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Vasily Fedosenko/Reuters)

Russia's President Vladimir Putin (front) walks as he attends a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Vasily Fedosenko/Reuters)

Germany's Chancellor Angela Merkel (R) and France's President Francois Hollande (L) walk as they attend a peace summit to resolve the Ukrainian crisis in Minsk, February 12, 2015. (Photo by Vasily Fedosenko/Reuters)