their way of life. that part of the story isn't often told when we gather for thanksgiving. >> really, so much is left out of history. just because it's written down, does not mean that it is, a, completely truthful and, b, the only way of expressing it. >> reporter: that organizers are careful to call this 400th year a "commemoration," not a celebration. peters says this week he will still have a feast. he will also remember. >> we give thanks for our ancestor's ability to persevere in spite of every obstacle that has been faced in front of them over the past 400 areas since the european arrival and the colonization of this country. so that's what we give thanks for. >> reporter: nancy chen, cbs news, plymouth, massachusetts. >> yuccas: what a great message. that's the "cbs weekend news" for this sunday. "60 minutes" is coming up. i'm jamie yuccas in los angeles. i know i've been very grateful