President Barack Obama and first lady Michelle Obama listen to performance during the White House Music Series saluting Blues Music in recognition of Black History Month, Tuesday, Feb. 21, 2012, in the East Room of the White House in Washington. On stage from left to right are Troy Trombone Shorty Andrews, Jeff Beck, Derek Trucks, Gary Clark, Jr., B.B. King, Buddy Guy, Warren Haynes, Shemekia Copeland, Susan Tedeschi and Keb Mo. (AP Photo/Pablo Martinez Monsivais)