Seven ordinary people walked through busy parts of town dressed in ordinary, but identical, denim pants and jackets and white painters' caps. Nonchalant, they moved in a group or alone, waiting for buses, reading newspapers, windown shopping. In their wake was laughter. Bees buzzing. Telephones ringing. Loud hammering. Unintelligible words in another language. Commotion. Croming from them, in unison, broadcast from circular speakers hidden under their jackets, attached to concealed tape players.