The Foo Fighters' Dave Grohl performs at RFK Stadium on Saturday, July 4, 2015, in Washington. (
The Foo Fighters' Dave Grohl performs at RFK Stadium on Saturday, July 4, 2015, in Washington. ( Nick Wass AP
The Foo Fighters' Dave Grohl performs at RFK Stadium on Saturday, July 4, 2015, in Washington. ( Nick Wass AP