The U.S. Postal Service honors the beginning of airmail service by dedicating two United States Air Mail Forever stamps this year.
The first stamp (pictured above) will be dedicated May 1, 2018, at the Smithsonian National Postal Museum in Washington, DC.
On May 15, 1918, in the midst of World War I, a small group of Army pilots delivered mail along a route that linked Washington, DC; Philadelphia; and New York City — initiating the world's first regularly scheduled airmail service. Airmail delivery, daily except Sundays, became part of the fabric of the American economy and spurred the growth of the nation’s aviation industry. The U.S. Post Office Department took charge of U.S. Air Mail service later that summer, operating it from August 12, 1918, through September 1, 1927.