I'm glad someone caught this and the passengers were rescreened.
But! There's no excuse in this day and age for the security breach to have occurred in the first place.
With the money that was thrown to the airlines from the government after 9/11....wouldn't it have been easy to install surveillence camera equipment???
It would at least be easier to identify the three people who went through the wrong entrance if they were on video....rather than re-screening thousands of passengers and holding-up flights. Total mismanagement, that at this point in time is unacceptable.