"Whose America?"

Twelve million illegal immigrants are already in the U.S., with more crossing the border every day. This week, Washington takes on immigration reform and we feature our special series "Whose America?"  Tonight, Lester Holt looks at what's happening in the border town of Laredo, Texas. Producer Marisa Buchanan e-mailed the photo below.  She estimates the Rio Grande dividing the U.S. and Mexico is less than 200 yards wide at this point.

Lester and Eugenio Rodriguez with the U.S. Border Patrol look across the Rio Grande, the river border between the U.S. and Mexico in Laredo, Texas. Photo by Marisa Buchanan, NBC News.