Russia's President Vladimir Putin enters a hall in his Novo-Ogaryovo residence outside Moscow, on April 18, 2014, before a video conference with Gazprom CEO Alexei Miller aboard the Prirazlomnaya ice-resistant oil platform in the Pechora Sea. AFP PHOTO/ POOL / MAXIM SHIPENKOV

TOPSHOTS Russia's President Vladimir Putin enters a hall for a meeting with Royal Dutch Shell CEO Ben van Beurden in the Novo-Ogaryovo residence outside Moscow, on April 18, 2014. The chief executive of Anglo-Dutch energy giant Royal Dutch Shell Ben van Beurden met today President Vladimir Putin at his private residence, telling the Russian strongman that the company wanted to expand its operations in Russia. The European Parliament called on yesterday for the EU to reinforce sanctions on Russia over the Ukraine crisis and be prepared to target economic interests. AFP PHOTO/ POOL / MAXIM SHIPENKOV

Russia's President Vladimir Putin arrives for his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis.. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEI NIKOLSKY

An woman watches the TV broadcast of Russian President Vladimir Putin's annual televised question-and-answer session with the nation while her grandson doing homework in the southern Russian city of Stavropol, on April 17, 2014. Putin said today claims Russian forces in east Ukraine 'nonsense', only locals involved. AFP PHOTO / DANIL SEMYONOV

Russia's President Vladimir Putin gives his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEY DRUZHININ

Russia's President Vladimir Putin gives his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEI NIKOLSKY

Russia's President Vladimir Putin gives his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEI NIKOLSKY

Russia's President Vladimir Putin speaks with journalists after his annual televised question-and-answer session with the nation at Gostiny Dvor (Merchant Yard) exhibition hall in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis. AFP PHOTO/ VASILY MAXIMOV

Russia's President Vladimir Putin gives his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis.. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEI NIKOLSKY

Russia's President Vladimir Putin gives his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis.. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEI NIKOLSKY

Russia's President Vladimir Putin gives his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis.. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEI NIKOLSKY

Russia's President Vladimir Putin gives his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis.. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEI NIKOLSKY

Russia's President Vladimir Putin gives his annual televised question-and-answer session with the nation in Moscow, on April 17, 2014. Putin accused today Ukraine's new authorities of driving the country towards the abyss but said that dialogue was the only way out of the intensifying crisis.. AFP PHOTO/ RIA-NOVOSTI/ POOL / ALEXEI NIKOLSKY

Russia's President Vladimir Putin addresses a joint session of Russian parliament on Crimea in the Kremlin in Moscow on March 18, 2014. Putin signed today a treaty with the leaders of Crimea on the Ukrainian Black Sea peninsula becoming part of Russia, state television showed. AFP PHOTO/KIRILL KUDRYAVTSEV

Russia's President Vladimir Putin (C) chairs a government meeting in his Novo-Ogaryovo residence, outside Moscow on March 5, 2014. Western and Russian leaders headed today into a day of diplomatic wrangling over the Ukraine crisis, a day after US President Barack Obama warned Moscow was not "fooling anybody" over its role in Crimea. AFP PHOTO/ RIA-NOVOSTI/ POOL/ ALEXEY DRUZHININ

Russia's President Vladimir Putin speaks during his meeting with Kazakh president Nursultan Nazarbayev and Belarus President Alexander Lukashenko in Putin's Novo-Ogaryovo residence outside Moscow, on March 5, 2014. Western and Russian leaders headed today into a day of diplomatic wrangling over the Ukraine crisis, a day after US President Barack Obama warned Moscow was not "fooling anybody" over its role in Crimea. AFP PHOTO/ POOL/ YURI KADOBNOV

Russia's President Vladimir Putin reacts during his meeting with Kazakh president Nursultan Nazarbayev and Belarus President Alexander Lukashenko in Putin's Novo-Ogaryovo residence outside Moscow, on March 5, 2014. Western and Russian leaders headed today into a day of diplomatic wrangling over the Ukraine crisis, a day after US President Barack Obama warned Moscow was not "fooling anybody" over its role in Crimea. AFP PHOTO/ POOL/ YURI KADOBNOV

Russia's President Vladimir Putin gestures during his meeting with Kazakh president Nursultan Nazarbayev and Belarus President Alexander Lukashenko in Putin's Novo-Ogaryovo residence outside Moscow, on March 5, 2014. Western and Russian leaders headed today into a day of diplomatic wrangling over the Ukraine crisis, a day after US President Barack Obama warned Moscow was not "fooling anybody" over its role in Crimea. AFP PHOTO/ POOL/ YURI KADOBNOV

In this frame grab provided by the Russian Television via the APTN, President Vladimir Putin, during a live feed, answers journalists' questions on the current situation around Ukraine at the Novo-Ogaryovo presidential residence outside Moscow, on Tuesday, March 4, 2014. (AP Photo/Russian Television via APTN)

In this frame grab provided by the Russian Television via the APTN, President Vladimir Putin, during a live feed, answers journalists' questions on the current situation around Ukraine at the Novo-Ogaryovo presidential residence outside Moscow, on Tuesday, March 4, 2014. (AP Photo/Russian Television via APTN)