In this photo taken late Tuesday, June 18, 2013, a traffic jam forms on a highway blocked because of a fire at a military depot near Chapaevsk in the Samara region of southern Russia. (AP Photo/Anatoly Bazhukov)
** FILE ** Russian President Vladimir Putin gestures while speaking during a media conference after a G-8 summit at the Lough Erne golf resort in Enniskillen, Northern Ireland, on Tuesday, June 18, 2013. (Associated Press)
Russian President Vladimir Putin, left, looks toward British Prime Minister David Cameron, center, and U.S. President Barack Obama during group photo with G-8 leaders on Tuesday, June 18, 2013, in Enniskillen, Northern Ireland. (AP Photo/Evan Vucci)
British Prime Minister David Cameron, left, shakes hands with Russian President Vladimir Putin during a press conference at 10 Downing Street in London, Sunday, June 16, 2013. Cameron had talks with Russian President Putin on the Syrian crisis amid fears that differences between Moscow and the West are pushing the two sides toward a new Cold War. (AP Photo/Anthony Devlin)
Russian President Vladimir Putin is expected to meet privately with President Obama during the G-8 summit in Northern Ireland, but maybe not at a pub. (Associated press)
Russian President Vladimir Putin speaks at a meeting with representatives of the G-20 Civil Summit at the Novo-Ogaryovo residence outside Moscow on Friday, June 14, 2013. (AP Photo/Yuri Kochertkov, Pool)
Serena Williams, of the U.S, celebrates a winning point as she plays Russia's Maria Sharapova during the Women's final match of the French Open tennis tournament at the Roland Garros stadium Saturday, June 8, 2013 in Paris. (AP Photo/Michel Euler)
Russia's Maria Sharapova celebrates scoring against Victoria Azarenka of Belarus in their semifinal match at the French Open tennis tournament, at Roland Garros stadium in Paris, Thursday June 6, 2013. (AP Photo/Michel Euler)
Russia's Maria Sharapova screams after winning the second set in the quarterfinal match against Serbia's Jelena Jankovic at the French Open tennis tournament, at Roland Garros stadium in Paris, Wednesday June 5, 2013. (AP Photo/Petr David Josek)
Russia hopes to recruit Steven Seagal as the face of an international marketing campaign to promote its weapons exports. The action movie star is shown here waiting for a news conference with a U.S. Congressional delegation at the American Embassy in Moscow on June 2, 2013. (AP Photo/Alexander Zemlianichenko)
U.S. actor Steven Seagal looks on as he waits for a news conference of U.S. Congressional delegation to Russia in U.S. Embassy in Moscow, Russia, Sunday, June 2, 2013. A U.S. Congressional delegation to Russia learned little about what could have been done to prevent the Boston Marathon bombings, but got to hang out with Steven Seagal. (AP Photo/Alexander Zemlianichenko)