Par avion Retracing the flight path of U.S. airmail 100 years later IT IS SAID OF U.S. MAIL CARRIERS, "neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds," which takes on a nostalgic meaning when you realize that the first transcontinental airmail delivery was 100 years ago on September 8 through 12, 1920. BY JULIE SUMMERS WALKER PHOTOGRAPHY BY CHRIS ROSE aopa.org/pilot AOPA aopa org/pilot AOPA PILOT PILOT | 75http://www.aopa.org/pilot