 There was a system that they had put up where you must enter through certain doors and all this sort of stuff. Detroit Police Department, which is not exactly a group of rocket scientists, they allowed four people in through a separate entrance that had backpacks and that were not screened by Secret Service. Secret Service found out about it, and they shut down the entire convention center, found out that it was benign, it wasn't bombs or anything, but they made everyone leave, re-screened them out of an abundance of caution.