Graduation season in the United States is a time of immense pride, celebration, and, for some universities, a logistical marvel. We're talking about institutions that don't just graduate a class, they launch a city's worth of new alumni into the world. But which U.S. universities can lay claim to hosting the largest commencement exercises, sending off a sea of gowned graduates in a single period? Let's dive into the world of mega-graduations.