The **2016 Cyber Grand Challenge (CGC)** was a landmark autonomous cybersecurity competition organized by DARPA. Held on August 4, 2016, at DEF CON 24 in Las Vegas, it brought together seven qualifying finalist teams from academia, industry, and the security research community. Their systems—called Cyber Reasoning Systems—had to automatically find, exploit, and patch software vulnerabilities in real time without any human intervention. CGC was **not designed as a high school competition** and did not accept direct participation from individual high school students; instead, it targeted expert research teams capable of building advanced automated systems. However, it remains highly relevant for high school students interested in cybersecurity and computer science as a case study in automated defense, capture-the-flag (CTF) competitions, and AI-driven security. Studying CGC’s published materials, open-source tools, and archived matches can provide motivated students with deep insight into program analysis, binary exploitation, and secure systems design.