Cybersecurity must become a high priority focus for managers of public infrastructure systems, experts say. The need for that precaution was exhibited by the recent hack of a water treatment plant in Florida, which put lives at risk by increasing amounts of lye (sodium hydroxide) in the water supply. The incident emphasizes that civil and environmental engineers must also learn what they can do to prevent such cyber threats, says Fulton Schools Professor Brad Allenby, a sustainable engineering expert. Fulton Schools Associate Professor Paulo Shakarian, a cybersecurity expert, describes details about the cyber attack on the Florida facility and talks about what defenses could be mounted to protect critical infrastructure from such security breaches.