On Monday, MIT welcomed undergraduates back to a new fall semester with the annual President’s Welcome Convocation. More than 9,000 people around the world tuned in to watch the live, virtual event. The event opened with “Together Everywhere: An MIT Convideocation” — a preproduced video that featured a flyover of MIT in Minecraft, the virtual campus that was constructed by MIT students at the start of the Covid-19 pandemic. President L. Rafael Reif welcomed undergraduates to the Institute, speaking against a virtual backdrop of Killian Court, where the ceremony typically…