Allen Burnsworth, owner of Sit Means Sit Dog Training in Los Angeles, demonstrates how to fight off a dog attack with Flash, a trained 2-year-old Belgian Malinois. Allie Ferguson/NPR hide caption

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Helping Postal Workers Fend Off An Age-Old Problem: Dog Bites
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The cash-strapped U.S. Postal Service hopes its new Harry Potter stamps will spark enthusiasm among a new generation of stamp collectors. USPS hide caption

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A U.S. Postal service employee loads his van as he prepares to leave the loading dock to deliver mail from the Los Feliz Post Office in Los Angeles. Kevork Djansezian/Getty Images hide caption

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Letter carrier Raymond Hou delivering mail on his route in San Francisco (March 2010 file photo). Justin Sullivan/Getty Images hide caption

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