Description:08 25 18 00 Washington. Conference, congress inter trade-union of the AFL-CIO, the most powerful syndicate of the United States. Close-up front window of the exhibition grouping together the various sectors. Slogan on banner " Democracy at Work ". Close-up various stands, cooks expose their dishes. Close-up mechanical stand. Close-up worker welder who makes an arc welding. Close-up projectionist who presents his device.