The breach at the Office of Personnel Management was one of the most significant cyberattacks in history, and now serves as a cautionary tale for many in Washington and beyond. But what do we know about it a year later? How did it happen? What are some of the lessons the federal government needs to learn to prevent such major breach from happening again? To answer that question and more, The Cybersecurity Podcast crew interviews one of the authors of the US House Oversight and Government Reform Committee, John Costello, who spent last year on Capitol Hill as a Science and Technology fellow through TechCongress.