The World’s Jason Margolis got a rare tour of the detention facilities in McAllen, Texas, that houses unaccompanied migrant children and families from Central America. There’s been a recent surge of such migrants this year, stretching the border’s immigration centers to the limit.The World’s Jason Margolis got a rare tour of the detention facilities in McAllen, Texas, that houses unaccompanied migrant children and families from Central America. There’s been a recent surge of such migrants this year, stretching the border’s immigration centers to the limit.