Tuesday afternoon when I arrived it was a nice afternoon, by Wednesday morning it was raining.
Rain quickly transformed into snow and winds were blowing ferociously so that many of the flights from Chicago O'Hare, were canceled. Since the conference was hosted in couple of different hotels (Sheraton, Hyatt, Mariott, Swissotel, Inter-continental, etc.) the walk between hotels was not pleasant at all.
So, Friday morning on my way from the presentation to the AirportExpress shuttle I could see in plain construction on the Chicago river shore the new Trump hotel & tower .
I really have to go see Chicago another time :-)