Russia

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FILE - In this May 9, 2014 file photo, Russian President Vladimir Putin heads to speak at a navy parade marking Victory Day in Sevastopol, Crimea. Angry with the West's response over Ukraine, Russia is moving rapidly to bolster ties with North Korea in a diplomatic nose-thumbing that could complicate the U.S.-led effort to squeeze Pyongyang into giving up its nuclear weapons program. Russia's proactive strategy in Asia- which also involves cozying up to China and had been dubbed "Putin's Pivot" - began years ago as Moscow's answer to Washington's much touted rebalancing of its military forces in the Pacific. (AP Photo/Ivan Sekretarev, File) **FILE**

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Russia's Maria Sharapova clenches her fist after scoring a point during the quarterfinal match of the French Open tennis tournament against Spain's Garbine Muguruza at the Roland Garros stadium, in Paris, France, Tuesday, June 3, 2014.(AP Photo/Michel Spingler)

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Russian Interior Ministry troopers give a training exhibition during a celebration of 197th anniversary of creation of Interior Ministry Forces in Ashukino, Russia, Thursday, March 27, 2008. (AP Photo/Sergey Ponomarev)

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Russian President Vladimir Putin speaks with special forces troops at a military training ground near the Siberian city of Chita, Russia, Wednesday, Aug. 28, 2002. During the visit Putin urged military leaders on Wednesday to maintain their combat-readiness and crack down on corruption, part of his push for reforming Russia's military to stem its steady decline since the fall of the Soviet Union. (AP Photo/ITAR-TASS, Presidential Press Service)

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Although the two foreign leaders are not expected to meet this week, President Obama departs Monday night on a four-day trip to Europe that is likely to reinforce his personal history of foreign-policy torment at the hands of Russian President Vladimir Putin. (Associated Press Photographs)