In 1979, Dr. Allan Ronald, a specialist in infectious diseases from Canada, and Dr. Herbert Nsanze, head of medical microbiology at University of Nairobi, met through the World Health Organization. Ronald had just completed a successful project that cured a chancroid (genital ulcer) epidemic in Winnipeg and Nsanze asked him to come to Kenya to help with Kenya s sexual diseases problem. That initial invitation led to a groundbreaking international scientific collaboration that would uncover critical pieces in the complex puzzle that became today s HIV/AIDS pandemic. In "Piecing the Puzzle,...