They will be turned back if they enter the united states illegally and do not have a basis for relief under our laws. >> reporter: customs and border protection also managing an unprecedented wave of unaccompanied children, with almost 19,000 arriving and arrested at the border in july, surpassing the previous record set in march, when border facilities were overcrowded and flooded with minors who waited on average over 120 hours in border patrol custody. >> just as we did with the challenge of unaccompanied children in march of this year, we have a plan. we are executing our plan, and that ta...