May 25, 2013 -- Updated 0233 GMT (1033 HKT)

Trust your memory? Bad idea

You probably feel pretty attached to your memories -- they're yours, after all. But one conversation with Elizabeth Loftus may shake your confidence about everything you think you remember.

Follow the Fit Nation 2013 team

Six CNN viewers were selected to be a part of the Fit Nation Triathlon Challenge program. Follow the "6-pack" as they train for a September triathlon.
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