Rhythmically swinging red balls to the blare of a polka, thousands of schoolgirls mass inside giant Strahov Stadium (capacity: 250,000) during this summer's Spartakiade. Beneath the triumphant slogan "Socialism has won in our country," 707,686 gymnasts performed for eight days in the athletic festival commemorating the liberation of Czechoslovakia from the Nazis.

Turning gravely under Maypoles, children solemnize the virtues of "honest work," while (right) students throng toward the stadium for a rehearsal. On the following pages a vast serpent of 13,980 agricultural and industrial apprentices exalt the peaceful uses of atomic power.