Reuters Pictures 3 weeks ago

U.S. President Barack Obama walks to Air Force One, followed by Press Secretary Jay Carney, following an event on energy security at Buckley Air Force Base and Air National Guard Hangar in Aurora, Colorado, January 26, 2012.

Reuters Pictures 3 weeks ago

A "Blueprint for an American Built to Last", a plan outlined by U.S. President Barack Obama at the State of the Union address, is shown on a lectern he used to deliver remarks on energy security at Buckley Air Force Base and Air National Guard Hangar in Aurora, Colorado, January 26, 2012.

Reuters Pictures 3 weeks ago

U.S. President Barack Obama greets servicemen and women following remarks on energy security at Buckley Air Force Base and Air National Guard Hangar in Aurora, Colorado, January 26, 2012.

Reuters Pictures 3 weeks ago

Members of the U.S. Air Force are pictured in the audience as U.S. President Barack Obama delivers remarks on energy security at Buckley Air Force Base and Air National Guard Hangar in Aurora, Colorado, January 26, 2012.

Reuters Pictures 3 weeks ago

U.S. President Barack Obama greets an airman as he arrives to deliver remarks on energy security at Buckley Air Force Base and Air National Guard Hangar in Aurora, Colorado, January 26, 2012.

Getty Images 3 weeks ago

US President Barack Obama shakes hands with soldiers before speaking at Buckley Air Force Base in Aurora, Colorado, on January 26, 2012 on US energy and the steps the administration is taking to promote energy security. Obama denied Republican claims he was waging class warfare as he...

Getty Images 2 weeks ago

Bulgarian Prime Minister Boyko Borisov (L) and US Secretary of State Hillary Clinton (L) arrive for a joint press conference in Sofia on February 5, 2012. The security situation in Egypt, developments in Syria and Iran as well as energy security, military cooperation and the Balkans...

AP Photo 7 months ago

Gene Shusman listens to speakers during the 'Energy Independence Day Tea Party' rally on Independence Mall in Philadelphia, on Monday July 4, 2011.

AP Photo 7 months ago

Audience members cheer during the 'Energy Independence Day Tea Party' rally on Independence Mall in Philadelphia, on Monday July 4, 2011.

AP Photo 7 months ago

Republican presidential candidate Herman Cain speaks during the 'Energy Independence Day Tea Party' rally on Independence Mall in Philadelphia, on Monday July 4, 2011.

Getty Images 10 months ago

US President Barack Obama speaks on energy security for the country March 30, 2011 at Georgetown University in Washington, DC.

AP Photo 10 months ago

President Barack Obama gestures during his speech on America's energy security, Wednesday, March 30, 2011, at McDonough Gymnasium at Georgetown University in Washington.

AP Photo 10 months ago

President Barack Obama pauses during his speech on America's energy security, in this photo taken Wednesday, March 30, 2011, at McDonough at Gymnasium Georgetown University in Washington. Americans grew increasingly pessimistic about the economy over the past month as soaring gas costs...

Getty Images 1 month ago

RIYAH, SAUDI ARABIA - JANUARY 13: Saudi Arabia's King Abdullah (R) meets British Prime Minister David Cameron on January 13, 2012 in Riyadh, Saudi Arabia. David Cameron met King Abdullah today on his first visit to the country since taking office in 2010 and carried out talks with the...

AP Photo 7 months ago

Harriet Ricchini, along with other audience members, sings the National Anthem during the 'Energy Independence Day Tea Party' rally on Independence Mall in Philadelphia, on Monday July 4, 2011.

AP Photo 7 months ago

Republican presidential candidate Herman Cain, left, is greeted by Madison Gewing, 7, and her mother Amy Gerwing during the "Energy Independence Day Tea Party" rally on Independence Mall in Philadelphia, on Monday July 4, 2011.

AP Photo 7 months ago

Ben Brubaker holds a sign while he participates in the '"Energy Independence Day Tea Party" rally on Independence Mall in Philadelphia, on Monday July 4, 2011.

AP Photo 7 months ago

John Bolton, former United States Ambassador to the United Nations, speaks during the 'Energy Independence Day Tea Party' rally on Independence Mall in Philadelphia, on Monday July 4, 2011.

AP Photo 7 months ago

Republican presidential candidate Herman Cain shakes hands with supporters during the "Energy Independence Day Tea Party" rally on Independence Mall in Philadelphia, on Monday July 4, 2011.

Reuters Pictures 8 months ago

Head of the North Caucasus Federal District Alexander Khloponin attends a meeting of the CEOs of global energy companies called "New paths to energy security" at the St. Petersburg International Economic Forum, June 17, 2011.

Reuters Pictures 8 months ago

Chief executive officer of Russia's oil company Lukoil Vagit Alekperov attends a meeting of the CEOs of global energy companies called "New paths to energy security" at the St. Petersburg International Economic Forum, June 17, 2011.

Reuters Pictures 8 months ago

Co-founder and chairman of Cambridge Energy Research Associates Daniel Yergin attends a meeting of the CEOs of global energy companies called "New paths to energy security" at the St. Petersburg International Economic Forum, June 17, 2011.

Reuters Pictures 8 months ago

International Energy Agency (IEA) Executive Director Nobuo Tanaka attends a meeting of the CEOs of global energy companies called "New paths to energy security" at the St. Petersburg International Economic Forum, June 17, 2011. Tanaka said on Friday he would like Russia and other...

Reuters Pictures 8 months ago

Russia's Deputy Prime Minister Igor Sechin attends a meeting of the CEOs of global energy companies called "New paths to energy security" at the St. Petersburg International Economic Forum, June 17, 2011.

Reuters Pictures 8 months ago

Russia's President Dmitry Medvedev (front) attends a meeting of the CEOs of global energy companies called "New paths to energy security" at the St. Petersburg International Economic Forum, June 17, 2011.