What is a key reason why small fragments of the shuttle might surface years after the disaster?

Answer

The small, charred pieces are often not immediately recognizable as space shuttle material by the average person

A crucial aspect to ongoing finds is the problem of identification; a small, charred piece of aluminum or composite material might look like scrap metal or residue to someone unfamiliar with shuttle wreckage.

What is a key reason why small fragments of the shuttle might surface years after the disaster?

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