What Site Reliability Engineering Actually Is, and Why It's a National Infrastructure Discipline

On July 8, 2015, the New York Stock Exchange halted all trading for three and a half hours. United Airlines grounded its entire fleet the same morning. The Wall Street Journal 's website went dark. By early afternoon, the U.S. Department of Homeland Security had confirmed that the three incidents were unrelated — each a cascading software failure, not a coordinated attack. The market lost nothing catastrophic that day. But the near-miss exposed something the technology industry had quietly known