FOREIGN RELATIONS: For Sneakers & Stumblers

U.S. tourists venturing behind the Iron Curtain usually sneak or stumble in. The sneakers, like some who attended the recent Moscow trade conference, plan their visits without telling the State Department when they apply for passports. The stumblers usually don't realize the perils of touring unbidden in the Red domain; they think that what happened to those trapped by their jobs behind the Curtain—Correspondent William Oatis in Czechoslovakia (see PRESS), Businessman Robert Vogeler in Hungary and 60-odd Americans in Communist China—can't happen to casual tourists.

Last week, aiming at both sneakers and stumblers, the State Department restricted all travel behind...