As a Harvard student I'm glad to see this. A few weeks ago I went to a seminar at MIT. Got there 5 minutes early to see that all the doors were keycard locked and I was supposed to walk ~20 mins to an office on the other side of campus to get a guest pass.

I just hung around until I could walk in with someone, but I'm glad to see that these buildings will be opening up again, not only for the general public but also for other academics in the area. The seminar was really cool too so I'm glad I made it in.