Uh-huh. And Congress hasn't provided for doing this, and will not do so, unless you can convince them to reactivate the draft to get the needed manpower.
Oh, and you'd have to draft all women of child-bearing age, too. Not to guard the border--to produce the next generation of troops to guard the border with, and the next generation of taxpayers to pay for all of those troops.
And precisely how has the Congress provided for Air Force fighters to intercept commercial airliners entering our air space?