on the first thanksgiving were there head reszs? no. reporter: were there shared turkeys? maybe. possibly. i mean, there s a lot of turkey around. reporter: was there an invitation? no. no way. no. i no reporter: instead the tribe arrived not to feast but fight. they d been alarmed by the sound of muskets the pilgrims fired for their first harvest. they felt it was a threat. they were ready to go to combat. in the smoothing over of the situation, they invited the warriors and their families to stay. which they did for three days. reporter: but for the tribe today, the fourth thursday in november is a national day of mourning. mourning the centuries of loss that followed that day of bounty. they took our kindness for