Seventy-Three Seconds Over Cape Canaveral

It was supposed to be the most uplifting flight in the history of the space shuttle program. Aboard Challenger on the morning of January 28, 1986, was Christa McAuliffe — a high school social studies teacher from New Hampshire, selected for NASA's Teacher in Space program to become the first teacher to fly in space. She planned to teach at least two lessons from orbit, and schools across America tuned in to watch the launch live. At 11:39 a.m. Eastern, Challenger lifted off from Kennedy Space Center in Florida — and seventy-three seconds later, it was gone.

The rest of the crew were commander Francis "Dick" Scobee, pilot Michael J. Smith, and mission specialists Ronald McNair, Ellison Onizuka, and Judith Resnik, plus Hughes Aircraft engineer Gregory Jarvis. It was Challenger's tenth flight and the twenty-fifth flight of the shuttle program. High above the Atlantic Ocean, about 46,000 feet over the water off Cape Canaveral, the shuttle broke apart, killing everyone on board.

The flight had already been delayed nearly a week by weather and technical problems, and the morning of January 28 was unusually cold for Florida. Engineers had raised concerns about the rubber O-rings that sealed joints in the shuttle's solid rocket boosters — the rings were not designed for such cold — but their warnings were overruled, and the launch went ahead. After the disaster, a presidential commission found that the failure of those O-rings in the right-hand booster had opened a breach for hot exhaust gas, dooming the vehicle.

The shock was immediate and national. It was the first time an American spacecraft had been lost with its crew while in flight. The shuttle fleet was grounded for 32 months while NASA redesigned the boosters and overhauled its decision-making; a replacement orbiter, Endeavour, was built; and the Teacher in Space program was ended, along with later plans to fly other civilians on the shuttle.

The presidential commission chaired by William Rogers also faulted NASA's decision-making culture, finding that engineers' warnings about the cold had been filtered out before they ever reached the officials who approved the launch.

The seven are remembered not just as a symbol of tragedy but as people who pushed at the edges of what ordinary life could include. McAuliffe's students never got their lessons from orbit — but her story, and theirs, became a different kind of lesson: that courage and curiosity are worth carrying with you, and that the people who speak up with warnings deserve to be heard.

Photo: NASA, public domain (via Wikimedia Commons).