Disaster

Tuesday, December 28, 2025

Today is a somber anniversary. On this day in 1986, America’s Space Shuttle Challenger broke apart 73 seconds into its flight and disintegrated 46,000 feet over the Atlantic Ocean, killing every crew member aboard. One crew, a non-NASA employee, was a schoolteacher going into space under a Teacher in Space Project.

Because the mission included a civilian, it drew high media interest and live streaming. Adults, as well as many children in schools, watched as video captured the launch and explosion.

Dialogues followed that unveiled “The O-ring Disaster.” In essence, key spaceship suppliers rushing to meet the liftoff date ignored their engineers who were questioning anticipated O-Ring performance.

(Spin forward to Boing’s troubles today because of gross mismanagement and frantic rushing to produce aircraft.)

The spaceship tragedy was caused by failures of the primary and secondary O-ring seals in a joint in one space booster. Record-low temperatures at launch time stiffened the rubber O-rings, reducing their ability to seal joints. Shortly after liftoff, the seals were breached; hot pressurized gas leaked through the joint and burned into an external propellant tank.

The explosion collapsed internal structures, causing rotations to throw the orbiter into aerodynamic forces that tore it apart. The now-destroyed craft flew uncontrollably until a range safety officer destroyed it.

That disaster today is imprinted in memory as firmly as the horrific assassinations of the Kennedy brothers, MLK, and John Lennon.

Dear Friends, Reliving my memories of the Challenger disaster and its aftermath. Diana