The following letter was sent to the MIT community today by President L. Rafael Reif. To the members of the MIT community, In advance of Tuesday’s online MIT Town Hall – tomorrow, May 5 at 4 pm EDT (2000 GMT) – I write for four important reasons: To give you a sense of the groundwork under way to map our options for summer and the start of the academic year To announce coming opportunities for you to hear more and contribute your thinking To articulate key principles to guide the…