Travelers entering the U.S. from Mexico cross a bridge at the San Ysidro Port of Entry in San Diego Sunday, April, 26, 2009. U.S. officials say they will begin asking travelers about illness if they're entering the country from regions with confirmed swine flu. The U.S. has declared a public health emergency, providing for easier access to flu tests and medications and increasing surveillance along the U.S.-Mexico border.
(Photo: AP)
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