In the fall of 2013, the Mayo Clinic hired a team of professional computer investigators from some of the biggest cybersecurity firms in the country. Billy Rios was one of the “white hat” hackers, meaning he's hired to break into company computers to identify vulnerabilities. Researchers split into teams and hospital officials at Mayo told them to do their worse with 40 different medical devices. Every day, every device was hacked and Rios knew it was worse than they had ever imagined. The Mayo Clinic went on to develop a set of security requirements for its medical device suppliers.