As the latest guest lecturer in the Topics in Biosecurity Symposia, Tom Slezak recounted his efforts in developing the national Biological Aerosol Sentry and Information System, a program known today as BioWatch, at his recent visit to the Galveston National Laboratory. The series of lectures features experts at the forefront of biosecurity development and implementation. [Note: This article was written by Maureen Balleza in UTMB’s Office of Marketing and Communications. Email us your story ideas.]