Mail is sorted and sent by air across the United States of America.
Titles read: "BIRTHDAY - US CELEBRATES AIR MAIL WEEK".
United States of America.
Various shots of US postal men sorting mail by hand and feeding it through machines. Sacks of transcontinental mail are put on an aeroplane in a Newark airfield in New Jersey. The plane takes off is seen flying over cities on its way to Chicago and then on to Los Angeles. When the plane lands the mail bags are unloaded and taken away by a man with a trolley.