A procedure is described for turning an elite cross-sectional survey into a panel study-even when no records exist that link individuals to their original questionnaires-and that also protects the respondents' anonymity. This method is used to add a second wave onto the Foreign Policy Leadership Project's 1988 cross-sectional survey. The procedure allows researchers to gather panel data after an unexpected and momentous event, so that they can document how individuals responded to the event.