Foo Fighters' Grohl Obama interview

Dave Grohl has been making music with The Foo Fighters for 20 years, but for the band's eighth studio album he wanted the recording process to be completely different.

Sonic Highways features eight tracks recorded in eight different US cities and each song is accompanied by a documentary about the musical history of that place, with interviews from people like Dolly Parton and President Obama.

Colin Paterson reports.