Singer Willie Nelson performs during an “In Performance at the White House” series event, attended by President Barack Obama, part of the Joining Forces initiative, an event with mus …

Singer Willie Nelson performs during an “In Performance at the White House” series event, attended by President Barack Obama, part of the Joining Forces initiative, an event with musicians, members of the U.S. military, military veterans, and their families inside a tent on the South Lawn of the White House, Thursday, Nov. 6, 2014, in Washington. Performances are expected by Mary J. Blige, Common, John Fogerty, Willie Nelson, and Romeo Santos. (AP Photo/Jacquelyn Martin)