U.S. President Barack Obama and first lady Michelle Obama stand for the national anthem as they arrive in their box for the 2013 Kennedy Center Honors at the Kennedy Center in Washington December 8, 2013. Musicians Herbie Hancock, Billy Joel and Carlos Santana, as well as opera singer Martina Arroyo and actress Shirley MacLaine are being honored this year for their lifetime contributions to American culture through the performing arts. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS ENTERTAINMENT)