Postal Service through the years

POSTED: 08:05 AM PST Feb 06, 2013    UPDATED: 09:35 AM PDT May 01, 2013 

Check out landmark moments in U.S. Postal Service history.

Postal Dates - First Airmail
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1918: Scheduled airmail service begins. The first efforts to deliver mail by air in the U.S. dated back to 1859, when a pilot tried unsuccessfully to carry mail via air balloon from Indiana to New York.

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