updated 7:49 AM EDT, Sat May 25, 2013

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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