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President Barack Obama speaks at a pipe yard outside Cushing, Okla., March, 22, 2012. Obama explained his energy policies Thursday at the site of the...

President Barack Obama prepares to take the stage for a speech at a pipe yard outside Cushing, Okla., March, 22, 2012. Obama explained his energy poli...

President Barack Obama while touring the Center for Automotive Research at Ohio State University in Columbus, Ohio, March, 22, 2012. Obama anounced Th...

President Barack Obama greets attendees following an address after his tour of the Center for Automotive Research at Ohio State University in Columbus...

FILE -- President Barack Obama is greeted by his dog Bo as he returns to the Oval Office in Washington, March, 15, 2012.Obama has been on the image of...

FILE -- President Barack Obama with British Prime Minister David Cameron at the first round of the NCAA Men's Basketball Tournament in Dayton, Ohio, M...

Former Pennsylvania Sen. Rick Santorum, a candidate for the Republican presidential nomination, holds a Etch A Sketch as he speaks at USAA in San Anto...

Former Pennsylvania Sen. Rick Santorum, a candidate for the Republican presidential nomination, speaks to reporters during a campaign stop at USAA in...

A Cuban woman pays tribute in front of the statue of the Virgin of Charity at the Caridad Church in Havana, Cuba, March 17, 2012. Ahead of Pope Benedi...

Parishioners attend a Mass at the Corpus Christi Church in Havana, Cuba, March 18, 2012. Ahead of Pope Benedict XVI's visit, the Catholic Church keeps...

Former Pennsylvania Sen. Rick Santorum, a candidate for the Republican presidential nomination, signs his autograph during a campaign stop at USAA in...

Former Pennsylvania Sen. Rick Santorum, a candidate for the Republican presidential nomination, speaks at USAA during a campaign stop in San Antonio,...

Beach goers rest in the sands of a beach at Camps Bay in Cape Town, South Africa, March 20, 2012. The upscale neighborhood was once reserved for white...

Commuters make their way to a taxi and train station in Cape Town, South Africa, March 20, 2012. Many non-whites live in distant townships. Cape Town...

Black men wait in the city center for day jobs in Cape Town, South Africa, March 20, 2012. Cape Town is the only major metropolis in South Africa wher...

Former Pennsylvania Sen. Rick Santorum, a candidate for the Republican presidential nomination, poses for a photograph during a campaign stop at USAA...

Former Pennsylvania Sen. Rick Santorum, a candidate for the Republican presidential nomination, speaks to reporters during a campaign stop at USAA in...

USAA employees attempt to photograph former Pennsylvania Sen. Rick Santorum, a candidate for the Republican presidential nomination, during his campai...

FILE -- Former Massachusetts Gov. Mitt Romney, a candidate for the Republican presidential nomination, greets supporters at a campaign event at the Am...

Patricia De Lille, Cape Town's mayor, at her office at the city council building in Cape Town, South Africa, March 1, 2012. Cape Town is the only majo...

Paul Nolan, center, plays Jesus during a scene from the musical "Jesus Christ Superstar" at the Neil Simon Theater in New York, Feb. 29, 2012. The Bro...

Paul Nolan, center, plays Jesus during a scene from the musical "Jesus Christ Superstar" at the Neil Simon Theater in New York, Feb. 29, 2012. The Bro...

Rob Stelling, who put down $40,000 in cash to make an early reservation for a Tesla Model S, leans on his Scion, the car he will be driving until his...

Chilina Kennedy, left, and Paul Nolan during a scene from the musical "Jesus Christ Superstar" at the Neil Simon Theater in New York, Feb. 29, 2012. T...

Jim Henry, a oilman, near Midland, Texas, Feb. 15, 2012. In 2003, Henry's team drilled deep into a hard limestone formation, using a refinement of the...

Paul Nolan, left, and Josh Young during a scene from the musical "Jesus Christ Superstar" at the Neil Simon Theater in New York, Feb. 29, 2012. The Br...

Gas prices at a gas station in San Diego, March 16, 2012. Increased energy production and declining consumption of oil have brought the United States...

Jay Lininger, an ecologist, with a topgraphical map of an undeveloped area of the Permian Basin near Lovington, N.M., Feb. 20, 2012. Lininger and and...

New Houses in Legends Park, a development going up in Midland, Texas, Feb. 14, 2012. Housing is in such short supply that drillers are importing contr...

Oil from wells flows through pipelines to a storage facility on the Giddings Estate, a 10,000-acre field near Midland, Texas, owned by Pioneer Natural...

A sign at Calvary Apostolic Church referring to the unexplained noises that have been occurring underground in Clintonville, Wis., March 21, 2012. Sin...

Workers collect paychecks at Rusty's Oilfield Service Company in Stanton, Texas, Feb. 14, 2012. In West Texas, unemployment is low and companies vie f...

An oil rig reflected in a fracking pond on the Giddings Estate, a 10,000-acre field in near Midland, Texas, owned by Pioneer Natural Resources, Feb. 1...

Workers attach a piece of pipe for lowering into an oil rig that is drilling a well to a depth of nearly 11,000 feet on the Giddings Estate, a 10,000-...

An Apache Corporation oil well near Hobbs, N.M., Feb. 14, 2012. Increased energy production and declining consumption of oil have brought the United S...

Workers move equipment used to monitor the progress on a well being drilled horizontally at an Apache Corporation oil well near Hobbs, N.M., Feb. 14,...

An A&W restaurant with its sign referring to the unexplained noises that have been occurring underground in Clintonville, Wis., March 21, 2012. Since...

Ranch signs along a road near Loco Hills, N.M., with oil wells pumping in the background, Feb. 14, 2012. Increased energy production and declining con...

Lisa Kuss, a city administrator, speaks to reporters after a community meeting about the strange underground noises that have been occurring in Clinto...

Taylor Blanks looks over maps that are marked with locations of reported underground noises in Clintonville, Wis., March 21, 2012. Since March 18, res...

Holding his daughter, resident Joshua Yagow asks a question during a community meeting about the strange underground noises that have been occurring i...

PHOTO ELIMINATION -- PLEASE REMOVE FROM USE PHOTO SLUGGED TITANIC ANNIV 16 - SHOWING A POSTER OF THE RMS TITANIC. THE POSTER IS A RENDERING FROM 1994,...

Masabumi Kikuchi, a jazz pianist, at the High Line in New York, March 8, 2012. Kikuchi finds new direction with "Sunrise," the first album under his o...

Masabumi Kikuchi, a jazz pianist, at the High Line in New York, March 8, 2012. Kikuchi finds new direction with "Sunrise," the first album under his o...

President Barack Obama speaks at the Copper Mountain solar facility in Boulder City, Nev., March 21, 2012. Obama spoke about diversifying the nation's...

President Barack Obama speaks at the Maljamar Cooperative Association Unit in Roswell, N.M., March 21, 2012. Obama on Wednesday assailed Republican cr...

President Barack Obama speaks at the Maljamar Cooperative Association Unit in Roswell, N.M., March 21, 2012. Obama on Wednesday assailed Republican cr...

President Barack Obama boards Air Force One for a trip to Nevada, at Andrews Air Force Base, March 21, 2012. Obama will visit Copper Mountain Solar 1...

President Barack Obama tours the Copper Mountain solar facility in Boulder City, Nev., March 21, 2012. Obama spoke at the facility about diversifying...

President Barack Obama speaks at the Copper Mountain solar facility in Boulder City, Nev., March 21, 2012. Obama spoke about diversifying the nation's...