Alien Species Slips Across the Border

When it comes to keeping non-native plants and animals out of
the country, the first line of defense is inspection. But the United
Department of Agriculture recently got a scare, when a noxious weed
slipped through the cracks and ended up for sale at stores around the
country. But will the incident change the way the USDA operates? The
Great Lakes Radio Consortium’s Wendy Nelson reports: