The sea of caps and gowns, many decorated with colorful regalia, is a memorable sight in Harvard’s Tercentenary Theatre on Commencement Day. But glance beyond the graduates and you’ll find an even larger gathering. Spectators, holding cameras, video recorders, bunches of flowers, and programs, fill every corner of the yard, stretching to the highest perches on the Widener Library steps. Parents, siblings, spouses, and friends — they form a grinning, proud pride. Staff members, working hard to make the University flow, pause and watch their favorite students on the cusp of their next chapter. Behind the success of each graduate stand the spectators. They come from next door, they come from around the globe, but they stand together and celebrate Commencement Day.