Not that the northern border (where terrorists come in) is particularly secure either, but in terms of the sheer and overwhelming numbers of people coming in, the southern needs immediate attention and action.
RE: unaccompanied 3-year-olds...see the Boehner letter posted above (THANKS, Ray76!). He's absolutely right about the safety of these children, aside from the other problems. We will never know how many unaccompanied 3-year-olds who attempted to get here never made it...
>> We will never know how many unaccompanied 3-year-olds who attempted to get here never made it...
A 3 year old would be brought to the border.