Red Crowds Celebrate May Day The may day celebration in Moscow gives the Russians a chance to crow long and loud over the west - for the theme running through the parade is their triumph in space. The guest of honor, of course, is Yuri Gagarin, first man to orbit the earth. Nikita Khrushchev stands next to Gagarin as he waves. Rocket balloon released in his honor. Floats including a picture of Lenin. Nikita waving hat, and Yuri waving. The face of a peoples whose leaders would wipe out democracy. Closer to the United States - 90 miles away to be exact - Fidel Castro takes the occasion of May Celebrations to dictate that Cuba is a Socialist party. Parade and Castro floats. Crowds.