Children are by definition vulnerable. That's particularly true for girls and boys journeying alone, under unsafe circumstances, often fleeing violence. Mexico and the US have an obligation to apply the international principle of the "best interests of the child" as the gold standard for all dealings with underage migrants.
Eight years a PBS film crew in a TV series called "My Journey Home" followed me back to Vietnam, and in Dalat, a small city on a high plateau full of pine trees and waterfalls and pristine lakes, they coaxed me into revisiting my childhood home. The quaint pinkish villa on top of a hill was by then abandoned, its garden overrun with elephant grass and wildflowers.