Pray that you are not headed to Philly to change planes!
I just did this and it was a nightmare. There are times when your plane comes into one terminal(D I think) and your connecting flight is in the other terminal(E I think).
I had to leave security and go back through it again to get to my connecting flight! What a pain in the buttocks.
I had to dump my Britta water bottle. I had forgotten it had water in it as I was not expecting to have to go through security again. I waited in line, got all undressed, including removing my shoes, jacket and sweater, and then was told to get out of line to get rid of the water!
The family behind me had purchased lunch at the first gate and had to dump much of it to get through security. They were really ticked!
I have never had that happen before. I will avoid Philly like the plague from now on!