There is a surprising amount of work being done on Vista today. I've been checking the webcam (
https://public.earthcam.net/vista/vi...er_view/view_3)
and they have done a lot of work on the lower floors. I noticed they also put up part of the awning for the hotel entrance. The link below is to a picture of the base.
https://www.vistatowerchicago.com/wp...ta_wide-25.jpg