Imported bugs vs. illegal aliens

Diagnosis: An invasive super-weed on the Mexican border that helps illegal aliens, drug smugglers and others elude capture. Remedy: Voracious Spanish flies and other bugs that feed on the Mediterranean weed. Homeland Security officials say the bugs, rather than pesticides, may be their best ally against the tall, dense weed. But they'll first have to prove that the foreign flies won't do more harm than good.