Past President (1980-1981) of the American College of Chest Physicians, Dr. John (Jack) G. Weg, Master FCCP, died on May 3, 2015. Jack had a distinguished career of more than 40 years at the University of Michigan in Ann Arbor, where he continued to serve as Professor Emeritus of Internal Medicine in the Division of Pulmonary and Critical Care Medicine at the time of his passing. Jack’s involvement with CHEST similarly spanned almost 40 years and included not only his term as President and being honored as a Master Fellow but also serving as chair of numerous committees and courses, and being a long-time member of the CHEST Editorial Board. In a recent video interview slated for CHEST’s Giants in Chest Medicine series, Jack cited one of his greatest education accomplishments as his involvement with the introduction of ACCP-SEEK. He was the CHEST Department Editor for the “ACCP-SEEK Board Review Question of the Month” for 10 years. Jack prided himself on encouraging young physicians to get involved with CHEST, and worked with the organization through the years to continually enhance the quality of the education the organization provided for physicians, nurses, and other medical professionals. All who had the pleasure of knowing Jack will miss him and will remember the important role he played in helping establish modern clinical pulmonary medicine. We extend heartfelt condolences to the Weg family.