Michael Riordan has taught the history of physics and technology at Stanford University and the University of California Santa Cruz. He is author/coauthor of three books in this area: The Hunting of the Quark, Crystal Fire (a history of the transistor), and most recently, Tunnel Visions: The Rise and Fall of the Superconducting Super Collider. Tunnel Visions is the definitive history of the SSC, a huge, multibillion-dollar high-energy physics project that was killed by Congress in October 1993 – five years after Congress had given the project a green light to begin construction. The SSC's principal physics goal was to discover the long-sought Higgs boson — or whatever else was responsible for imbuing elementary particles with their characteristic masses. But Congress terminated this project after its total estimated cost exceeded $10 billion and no major foreign contributions had yet been committed. What went wrong? What were the consequences for U.S. science, especially the large-scale projects that high-energy physics requires in trying to push back its scientific frontiers? Michael Riordan will share his thoughts on these complex issues.