One other question: Is this the same Heavy that was crashing a year or two ago? Is that section going to do re-entry at some point?
That video probably explained it all, but I skipped to the launch.
Yep, the center booster comes back down but unlike the Chinese where they just let it fall wherever (Chinese Booster Bingo) they aim for a spot in the ocean for that.
They have yet to land the center booster of a heavy. They tried a couple of times but failed, the other heavy launches, including this one, they didn't even try and the center section was expended due to it not having enough fuel left for a landing and in some cases too far down range to try. A few F9 have been expended for this same reason. Landings require fuel and some launches depending on payload and orbit requirements don't leave enough to try.