U.S. Customs and Border Protection officers have begun apprehending a new kind of illegal immigrant: Mexicans on buses headed back to Mexico. Oddly, this exercise is taking place at Mexico-bound checkpoints near the Tijuana-San Diego border. Critics say it's a reflection of growing anti-immigrant backlash and that it will discourage immigrants from going home. Others say it helps reinforce the message that the United States is serious about its border enforcement. Orange County Weekly's "Ask a Mexican" columnist Gustavo Arellano joins us.

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