I had to dig a bit, but MIT's "Transparent Horizons" (local description: "is neither") turns out to be Louise Nevelson's work, and "The Great Sail" is a Calder; turns out MIT didn't end up with any of Serra's work in the Big Hunk Of Metal genre. (On the other hand, unlike Serra, as far as I know none of Nevelson or Calder's installations actually killed anyone...)