On January 28, 1986, the space program experienced one of its most catastrophic events to date when the Space Shuttle Challenger broke apart just over a minute after launch. All seven crew members died, including Christa McAulliffe, a school teacher who would have been the first teacher in space. If you’re familiar with the event at all, you know the accident was caused by a failed O-ring seal in the solid rocket booster. What’s less widely known is that, according to the recently released Netflix documentary, Challenger: The Final Flight, NASA and the company that manufactured those O-rings had information available to them that day that could have led to a different outcome. For example: The O-rings were a known problem. In many of the successful launches using solid rocket boosters prior to the Challenger, there was evidence of damage to the O-rings during launch. The temperature the day of the launch was much colder (by at least 20 degrees) than typical launch days. More than one expert at the O-ring manufacturer voiced concern that the part had not been tested at that temperature and could fail. NASA made choices about the data they used that day. They went into their decision-making process with a bias (they were motivated to launch after a series of delays), and they failed to see how that bias motivated their choices and in turn influenced their behavior. In education, we make choices about our data, too.