In America every profession has its annual convention.
Even the hobo - the homeless outlaw who grabs illegal rides on freight-trains - is invited once a year to the Iowa town of Britt for a celebration of his lifestyle.
Is it a gimmick to attract the tourists to the Hobo Museum, a sentimental effort to turn sad old bums into romantic icons of a mythical past? Or is it a gathering of the last people in America who understand the meaning of the word freedom?
Gerry Anderson joins the party down in the Hobo Jungle.