U.S. Supreme Court Justice Ruth Bader Ginsburg (center) is congratulated after being serenaded by opera singer Plácido Domingo (left) after both were awarded honorary degrees. Ellen Johnson Sirleaf (right), Sir Timothy Berners-Lee, Dudley Herschbach, James R. Houghton, Rosalind Krauss, J. G. A. Pocock, and David Satcher also received honorary degrees during Thursday's Commencement Exercises.