One down, one to go: Exterior construction wraps up at the first of two towers at 400 N. Lake Shore

After more than two years of construction, Chicagoans can now see what the residential tower built on the spot of the proposed Chicago Spire will look like — from the outside, at least — once completed. Exterior construction wrapped up late last month on the 72-story skyscraper at 400 N. Lake Shore Drive, with the installation of the building's last piece of facade glass. That means what we now see of the 857-foot tall glass building is what we'll get. Crews are building out the interior and…