AdvertisementNative American tribes are gathering in Plymouth to mourn on ThanksgivingNovember 25, 2021The Associated PressfacebookEmailSupporters of Native Americans pause following a prayer during the 38th National Day of Mourning at Coles Hill in Plymouth, Mass., on Nov. 22, 2007. Denouncing centuries of racism and mistreatment of Indigenous people, members of Native American tribes from around New England will gather on Thanksgiving 2021 for a solemn National Day of Mourning observance. (AP)