Explore a thought-provoking conference talk on industrial cybersecurity delivered by Marty Edwards from the International Society of Automation (ISA) at the Industrial Cybersecurity Conference 2019. Delve into the evolution of control system history, debunk the myth of air gap security, and examine the current challenges facing the industry. Discover the concept of cyber-informed engineering and its application in addressing security concerns. Analyze the cyber kill chain and its implications for industrial systems. Engage with controversial topics in the field and gain valuable insights to enhance your understanding of cybersecurity in industrial environments. Conclude with a comprehensive summary of key takeaways to apply in your professional practice.