Immigration Law Hangs on Closing Rugged Frontier Around Nogales

Immigration Law Hangs on Closing Rugged Frontier Around Nogales

Amanda J. Crawford/Bloomberg

The daily struggle along the rugged Nogales frontier, which the U.S. government ranks as the highest-risk sector of its border with Mexico -- a region where more than 124,000 people were caught crossing last year -- points to a security challenge central to enactment of any new immigration law.