Mike McCoy, advisory committee member for the Tijuana River National Estuarine Research Reserve, worries that border fence construction will silt up the Tijuana River estuary.
The immigration reform Congress is considering includes billions of dollars to build hundreds of new miles of fencing along the U.S.-Mexico border. Backers say the fence deters people from crossing. Critics say the recession did that. Whatever the case, the fence we have in place now has taken an environmental toll on the region. Reporter: Jill Replogle