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Part 1

Geneology
for sale

  The pros and cons of the selling family histories online.

  Web exclusive: A family finds roots
Part 2
The downside of DNA testing

  Are disease predictors accurate?

A special Nightly News series
Part 3
DNA often the best tool

  For Wilton Dedge, DNA was the piece of forensic evidence that set him free from rape allegations.

More web-only videos
Cleared too late

  Hear more from Wilton Dedge.

  Forensic specialist on the need for DNA
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    Wars generate millions of records, from the color of soldiers' eyes to what their neighbors may have said about them. Full story

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