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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USPS

Veteran USPS letter carrier Michael McDonald gathers mail to load into his truck before making his delivery run in the East Atlanta neighborhood on Thursday, Feb. 7, 2013, in Atlanta. David Goldman/AP hide caption

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David Goldman/AP

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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Kevork Djansezian/Getty Images