Description: [edan-image:id=siris_sic_12022,size=250,left]Volunteers have been an integral part of the Smithsonian since its earliest years. The Institution has always been “dependent on the kindness of strangers.” Volunteers make tremendous contributions to Smithsonian operations every day in virtually every corner of the globe. The Smithsonian's paid staff of some 6,000 employees is
Description: Take a listen to clips from The World Is Yours episode “Early Air Mail” and its short reign under the United States Postal Service from 1916 to 1926.