While the STS-107 was re-entering earth, a tragic explosion took
the lives of seven innocent and hard-working astronauts. The cause for the
explosion is explained through many theories, however, they have been proven
wrong. The most widely believed theory is that a tile from the shuttle itself
has fallen and caused the shuttle to explode.
Three cracks were found in July in the shuttle's
stainless steel liners that were used to direct the flow of super-cold
hydrogen fuel to the main engines, which might have been thought to be the
reason for the February crash. The age of the cracks weren't considered
because similar cracks had been found in old and new shuttles as well.
What do you believed, happened to the Columbia Shuttle?