I think your checkering bags go straight to destination, but they will make you go through a transfer security checkpoint, and scan your carryon

Do you have Sky Priority? If so, you'll be fine. If not, the line seemed long to me. They had 4 or 5 lines, but the x ray machine had a very short "landing" and people seemed slow to take out their computers and remove their coats (one at a time). US airports seem to have a larger landing so 2-3 people are unloading at the same time.