The members of the Committee on Assessment of Security Technologies for Transportation are deeply saddened by the recent loss of one of the committee’s members. John B. Daly had a distinguished career serving the nation in a broad range of positions involving transportation security and technology, and he was the recipient of numerous awards and commendations for his outstanding contributions to the field. He was appointed to this committee in 2005 and continued to serve with distinction until his illness no longer permitted his participation. He was a hardworking professional of the highest integrity. We dedicate this report to his memory as a token of our appreciation for his contributions.