From
Space.comThe Columbia disaster occurred On Feb. 1, 2003, when NASA’s space shuttle Columbia broke up as it returned to Earth, killing the seven astronauts on board. NASA suspended space shuttle flights for more than two years as it investigated the cause of the Columbia disaster.
An investigation board determined that a large piece of foam fell from the shuttle's external tank and breached the spacecraft wing. This problem with foam had been known for years, and NASA came under intense scrutiny in Congress and in the media for allowing the situation to continue.
See also
https://en.wikipedia.org/wiki/Space_Shuttle_Columbia_disasterNot a railway story, but a common transport thread that moving around has its risks (and for the writer of "On this day" things that go wrong are remembered by their day and month and provide easy material on otherwise quiet days).
But in history there's always been a common thread where problems are known and issues observed, but minimal attention is paid to them and lessons are not learned until there's a really spectacular accident. Take a look (on rail) at absolute block working, at gas
heating lighting in carriages, at continuous brakes, at single in tokens and interlocking, at signals passed at danger and you'll find repetition. And so you see that Columbia was lost to a known problem.
Whilst there
are still repeats to this day, I celebrate the
RAIB▸ - Rail Accident Investigation Branch - who help keep them to a minimum. I really don't want too many more "easy" days where there's a big accident to report.
Edit - correction to use of gas in trains