April 12, 1955, was supposed to be Tommy Francis’s day. At 10:20 a.m., the distinguished epidemiologist was scheduled to conduct an international press conference in Rackham Auditorium at the University of Michigan. The topic was the field trial he had just completed — the largest of its kind ever — evaluating the efficacy of the poliovirus vaccine developed by Jonas Salk at the University of P...

O rg a n iz e r s e x p e c t a ta lk today at Notre Dame by worldfamous businessm an W arren Buffett to attract several thou­ sand people. T he ta lk , A Conversation with Warren B u ffe t ,” is f re e and open only to Notre Dame s t u d e n t s , facu l ty and staff. It is at 11 a .m . in th e Joyce C en te r arena. At Buffett’s request, the event also will be closed to all news media, except...