This webinar reviews a standard set of Top 20 ICS attacks as a methodology for communicating cyber-sabotage risk, with the Top 20 set representing ICS attacks of varying levels of cyber and engineering sophistication, and with varying degrees of undesirable physical consequences. We recommend that a standard Top 20 includes both ICS attacks that are reliably defeated by existing cyber defenses, and attacks that are not so defeated. Full report on the Top 20 Cyber Attacks on industrial control systems is available here: https://waterfall-security.com/20-attacks