trouble on our southern border. for a look beyond the news, here is journalist liz trotter with her weekly commentary. as our foreign policy lurches from one ill conceived notion to another, a threat to national security is unfolding at our own southwest border. you ve probably seen the nightmarish pictures of the dream children sleeping on cement floors. the swamped border guards, the effects of spreading disease. having heard the rumors of a guaranteed instant border crossing, the new arrivals, mostly unaccompanied children, eagerly surrender. why not? the word is out in central america and mexico that entering the united states is no problemo. still the administration insists