Dick Zare gives the first Johnson/Sessler Lecture on the Cinco de Mayo! This lectureship was made possible through the generosity of Jonathan Sessler, Welch Professor at the University of Texas. Jonathan is a pioneer in the develop of cancer treatment drugs, motivated in part by his personal experiences fighting this disease. Jonathan and Mark were in the same class at Berkeley (‘77) and roommates at Stanford in La Casa Matadero. Thank you Dick and Jon!