we have nearly five million commercial buildings, almost one hundred million low-rise homes, and eight million or so high-rise residences. We add somewhere around seventy thousand new commercial buildings, and one million new homes each year. But ‘building failure’ – defined as partial or full collapse of a functioning structure – is exceedingly rare, especially for skyscrapers. According to a 2003 Ohio State University study, the United States experiences an average of just twenty serious ‘building failures’ per year. That’s an annual avoidable failure rate of less than 0.00002 percent. The checklists work.”