Commencement 2012: The day in pictures May 18, 2012 SHARE Spontaneous bursts of joy broke out all day long on the campus of Washington University in St. Louis as the university held its 151st Commencement May 18 in Brookings Quadrangle. From the memorable speech made by Pulitzer Prize-winning cartoonist Mike Peters to the conferring of honorary degrees and singing of the “Alma Mater,” it was a day of smiles. The slideshow that follows commemorates it all. Photos by Joe Angeles and Mary Butkus (Credit: Mary Butkus)