Moscow city. Parade and demonstration on Red Square on July 27, 1920. On the government platform: G. E. Zinoviev, N. I. Bukharin, L. D. Trotsky, A. V. Lunacharsky, N. I. Podvoisky, M. I. Kalinin , K. B. Radek and others. Aerostat over the square. Sports festival at the Moscow Hippodrome on July 28, 1920. Among the spectators are delegates to the II Congress of the Comintern.