1syuzh- Preparing the workers of Moscow for the celebration of May 1: they hang up banners, artists draw posters. Columns of demonstrators pass through the streets of Moscow. People's Commissar for Defense K. Ye. Voroshilov drives around the troops on Red Square before the parade; parade of troops; leaders of the party and government from the rostrum of the Mausoleum welcome the participants in the parade and demonstration; among them - I. Stalin, M. Kalinin, A. Mikoyan, S.M. Budyonny, I.S. Unshlikht, I.P. Uborevich, G.G. Yagoda, A.I. Rykov, Ya.B. Gamarnik, M.P. Tomsky, V.M. Molotov. Columns of demonstrators are on Red Square.