I still didn't make it into Philadelphia proper. After the extremely short night on Tuesday, I ended up crashing Wednesday night. One of the guys at the lab told me I shouldn't go into Philly at night anyway, if I am not familiar. He said it's gotten really bad. "Everybody's shooting everyone".
I also wasn't too happy to get off the plane in KC with the temperature at 34°F. It was still 74° when I left Philadelphia. And the only "warm" clothing I took was a sweater. And it was packed in the checked bag.