reporter: why isn t hhs talking to dhs? they re supposed to be working together every single day. it s the agency that comes to this facility to pick up the children. yesterday in that press conference secretary nielson said she had toured detention facilities before. after some prodding today by our colleagues, she d never been here, ever. this is the epicenter. this is the place where more than anywhere else children are being separated from their parents. how is she talking about what happens in there without have been be in there, without seeing the mylar blankets and the mats and the cages? can you truth squad this for us a little bit. it becomes jarring to watch the volume of lies that come out of washington. you re on the ground. what are we being most misled about? reporter: wow. that s a good question. frankly, what s happening here and why it s happening. i mean, it s pretty simple actually. the answer is president trump decided to put in place a policy