July 7, 2019 CBS News Sunday Morning : Season 41 Episode 42

This week's edition of "Sunday Morning," hosted by Jane Pauley, features Allison Aubrey reporting on hamburgers that are made from plants instead of beef. Plus: Serena Altschul reports on "Beyond the Streets," the largest exhibition of graffiti and street art ever produced; Luke Burbank attends Monster Jam University; Michelle Miller reports on designer Dapper Dan's saga that's been three quarters of a century in the making; Steve Hartman reports on a 97-year-old who loves a hard day's work; John Blackstone reports on what America, the band, is up to; Jim Gaffigan says cheeseburgers are in "grave danger"; and Mo Rocca takes a trip down the Mississippi River