Postal Service through the years

Published On: Feb 06 2013 10:05:34 AM CST   Updated On: May 01 2013 11:35:15 AM CDT

Patrick Donahoe, postmaster general of the struggling United States Postal Service, "has decided to retire" in February after serving 39 years at the agency, the USPS announced Friday. 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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