The other activities included a ceremonial flight that honored an Aug. 12, 1918, trip that marked the transition of airmail service from the Army to the U.S. Post Office Department.
During the re-enactment, pilot John Weyrich flew a Stearman, a biplane used in World War II training exercises, around College Park, MD, where the 1918 flight originated.
The College Park Aviation Museum, which hosted the stamp dedication ceremony, organized the ceremonial flight and the other activities.
The weekend also included a pancake breakfast and a “family day” where attendees could get an up-close look at the Stearman, as well as a gala celebration to mark the debut of an airmail-themed exhibit. Some attendees wore 1920s cocktail attire.
“They were the astronauts of their day” Miller said.