Top, during a lull in the ceremonies on the College Green, a senior snaps a few parting shots of her classmates. Middle, after the stress and strains of medical school, Lily Wu, Courtney Olson, Stanley Voigt, and Nick Monu clasp their green velvet hoods before lining up for the Procession. Bottom, seniors press the flesh as they pass alumni and an eager group of children on their way down College Hill.