A quarter of a century from that disaster.
I think the reason this happened is just like how Apollo 13 got unlucky; a sense of routine.
NASA flew the space shuttle 24 times before times before this, and this was probably more than enough to loosen the tension of the building and the launching.
And what about now, 25 years later?
The launch of the next-to-last space shuttle Discovery is being delayed again and again and again. Well, I guess this shows NASA has learned its lesson and tightening safety measures for space explorations, which is good.
I wonder what the next fleet of spaceships NASA is planning as the successor to the space shuttle.
I hope for a spaceship that doesn't need heavy maintenance every time it lifts off but still really safe as the successor.