American Routes celebrates Thanksgiving weekend with a sonic cornucopia from National Endowment for the Arts’ Heritage Fellows — recipients of America’s most prestigious award in folk & traditional arts. We’ll hear music and conversation from past Fellows: bluegrass picker Del McCoury, rockabilly Wanda Jackson, sacred steel guitarists, the Campbell Brothers, and late blues singer Koko Taylor. The 2016 Fellows, many performing live in Washington, include: Mardi Gras Indian Chief Monk Boudreaux, Irish accordionist Billy McComiskey and Mexican-American singer Artemio Posadas. Other awardees range from basketmakers in Kentucky and the Penobscot tribe in Maine, to traditional wind instrumentalists from South Dakota and Laos.