building a wall on the southern border. meanwhile homeland security secretary kirstjen nielsen is thanking dhs workers who are on the job while confirming nearly 75% of those employees are not getting a paycheck. at one of the nation's busiest airports, they're starting to feel the impact. there at the security lines, we're talking about miami international, where we have rosa flores this afternoon, rosa, part of that airport is closed this weekend. tell us why. >> reporter: well, there are not enough tsa workers to operate all of the 11 checkpoints at this airport. so they've closed partially temporarily concourse g. so this is the one that you're seeing on your screen right now, you see the no entry sign, the desks are clear, right now, they're just picking up the trash at this point, because all of the flights that normally leave from this concourse have been redirected, and they're being reassigned to other