Immigration Rhetoric: 'Untied States of America' [audio 5min]

President Bush recently warned against the"harsh, ugly rhetoric" in the debate over immigration. Author Juan Enriquez says the brutal language being used in that debate threatens to tear the country apart. Enriquez writes about those divisive factors in his book The Untied States of America: Polarization, Fracturing, and Our Future."Countries are actually very fragile entities," Enriquez says."Three-quarters of the flags, borders and anthems in the world did not exist 50 years ago. It's a lot easier to split a country than it is to keep it." Enriquez is the CEO of Biotechonomy, a life-sciences research and venture capital firm. ~Website offers book excerpt, audio clip.