promoted -- cho

So it seems the White House reused e-mail tapes... Would someone explain this to me as if I were a six year old?

White House reused e-mail tapes
excerpt:

WASHINGTON - The White House has acknowledged recycling its backup computer tapes of e-mail before October 2003, raising the possibility that many electronic messages — including those pertaining to the CIA leak case — have been taped over and are gone forever.

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