Revealed: the truth behind the wall the US government is building on the border with Mexico. According to Homeland Security secretary Michael Chertoff:
"Illegal migrants really degrade the environment. I've seen pictures of human waste, garbage, discarded bottles and other human artifact in pristine areas. And believe me, that is the worst thing you can do to the environment."
So it's not to keep out illegal immigrants, it's for the environment! Take that, liberals.