Air Mail To President Hoover, 1929 ID: 1522 | This file appears in: Cleveland Hopkins International Airport An Air Mail pilot poses in front of his plane with an oversized letter addressed to President Herbert Hoover. U.S. Air Mail flights made up the bulk of Cleveland Municipal Airport's early flights. Image courtesy of Cleveland State Library Special Collections Download Original File "Air Mail To President Hoover, 1929" appears in: Cleveland Hopkins International Airport