U.S. President Barack Obama (R) holds the chair for first lady Michelle Obama to sit down in during the National Prayer Breakfast in Washington, February 5, 2009. REUTERS/Larry Downing (UNITED STATES)

U.S. President Barack Obama (C) and his wife Michelle (R) are serenaded by Beyonce in their first dance of the night during the Neighborhood Inaugural Ball in Washington January 20, 2009. Barack Obama took power as the first black U.S. president on Tuesday and quickly turned the page on the Bush years, urging Americans to rally to end the worst economic crisis in generations and repair the U.S. image abroad. REUTERS/Rick Wilking (UNITED STATES)