First commercial air mail service flights have typically been recorded by the creation of philatelic covers. The use of Scout commemorative stamp issues increases their interest to Scouts on Stamps collectors. Typical usage has two stamps on cover to meet the air mail postage rate. This Scout air mail postage usage in the United States began with the Juliette Low issue of 1948. Scout stamps were also used on air mail covers commemorating Airport Dedications. The addition of new domestic air mail routes slowed after the 50th Anniversary of BSA issue of 1960.