At the time of writing, Foo Fighters are serving as the house band for the Late Show With David Letterman (everyone’s gotta earn a living, I guess.). One of the residency’s highlights was this cover of Black Sabbath’s evergreen ‘War Pigs,’ which they performed alongside country artist Zac Brown who I believe is “quite a big deal” across the pond) Turn it up and bang your heads. Trust me, you’ll thank me afterwards.