<b>How the discovery of a harmless leak of radiation sparked a media firestorm, political grandstanding, and fearmongering that closed a vital scientific facility.</b><br><br>In 1997, scientists at Brookhaven National Laboratory found a small leak of radioactive water near their research reactor. Brookhaven was—and is—a world-class, Nobel Prize–winning lab, and its reactor was the cornerstone of US materials science and one of the world’s finest research facilities. The leak, harmless to health, came from a storage pool rather than the reactor. But its discovery triggered a media and political firestorm that resulted in the reactor’s shutdown, and even attempts to close the entire laboratory.<br> <br>A quarter century later, the episode reveals the dynamics of today’s controversies in which fears and the dismissal of science disrupt serious discussion and research of vital issues such as vaccines, climate change, and toxic chemicals. This story