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A U.S. Border Patrol agent stands at the U.S.-Mexico border fence on February 26, 2013 in Nogales, Arizona. Various federal agencies are tasked with securing the border from drug smugglers and illegal immigration in the Tucson sector of Arizona.
Detentions along the U.S.-Mexico border are down and spending on border security is on the rise, but it's not clear that all that money is making a difference.
A review of the estimated $100 billion that the U.S. has already spent on border security in the past decade reveals mixed results.
For more, we turn to investigative reporter Greg Moran with the San Diego Union Tribune. He investigated audits of U.S. Customs and Border Protection and joins us to talk about his findings.