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Traffic in the US enters Mexico at the San Ysidro border crossing, the world?s busiest, on June 27, 2008 in Tijuana, Mexico.

For anyone who crosses the U.S.-Mexico border, long wait times are a constant source of frustration. That's especially true during the holiday season. 

But the port of entry between Tijuana and San Diego is being expanded. From the Fronteras Desk in San Diego, Adrian Florido reports.