08-29-2021 CBS News Sunday Morning : Season 43 Episode 35

Ted Koppel on gun violence; El Museo del Barrio; Lee Cowan interviews Zalmay Niazy, interpreter for U.S. forces and contractors in his native Afghanistan; Anthony Mason interviews singers/songwriters David Crosby, Stephen Stills, and Graham Nash; Faith Salie interviews TV personality Padma Lakshmi ("Taste the Nation with Padma Lakshmi"); retired Navy SEAL Eddie Gallagher;