President Barack Obama talks about alternative energy at the Trinity Structural Towers plant in Newton, Iowa on April 22, 2009. The facility, housed in a former Maytag plant, produces towers for wind energy production. (UPI Photo/Brian Kersey)

U.S. President Barack Obama (L) meets with Iraq's Prime Minister Nouri al-Maliki in Baghdad, Iraq on April 7, 2009. President Obama's unannounced visit to Iraq is his first to a war-zone since he took office. (UPI Photo/Ali Jasim)

U.S. President Barack Obama delivers remarks about investments in clean energy and new technology included in the budget in the Eisenhower Executive Office Building adjacent to the White House in Washington on March 23, 2009. With Obama are Susan Hockfield, President of the Massachusetts Institute of Technology, (R) and Paul Holland, a member of the board of directors of Serious Materials and general partner and head of the CleanTech Practice at Foundation CapitalAFP. (UPI Photo/Roger L. Wollenberg)

U.S. President Barack Obama joins host Bill Cosby (L) and James Taylor (R) on stage to lead in singing 'Happy Birthday' to Senator Ted Kennedy at a musical tribute to celebrate Kennedy's birthday at the Kennedy Center in Washington on March 8, 2009. (UPI Photo/Chris Usher/Pool)

President Barack Obama raises his glass in a toast as he welcomes the nation's governors to a black-tie dinner at the White House, February 22, 2009. The National Governors Association has been holding their 2009 Winter Meeting this weekend, where the nation's governors have been discussing Obama's stimulus program, as well as health care, infrastructure and education. (UPI Photo/Mike Theiler)

U.S. President Barack Obama speaks to employees at the U.S. Department of Energy in Washington on February 5, 2009. (UPI Photo/Ron Sachs/Pool)

President Barack Obama enters the the Oval Office to begin his first day as President of the United States, at the White House in Washington on January 21, 2009. (UPI Photo/Pete Souza/White House)

Barack Obama is sworn in as the 44th President of the United States of America during his Inauguration Ceremony on Capitol Hill in Washington on January 20, 2009. (UPI Photo/Kevin Dietsch)

Barack Obama takes the oath of office from Supreme Court Chief Justice John Roberts to become the 44th President of the United States on the west steps of the Capitol on January 20, 2009. Holding the bible is his wife Michelle with their daughters Malia and Sasha. (UPI Photo/Pat Benic)