Led Zeppelin guitarist wanted to do 'biological research'

For three of the world's greatest guitarists, their instrument was a ticket out of poverty and professional drudgery.

It Might Get Loud is a documentary by Davis Guggenheim, awarded an Oscar for environmental film An Inconvenient Truth, that focuses on Jimmy Page formerly of Led Zeppelin, The Edge of U2 and Jack White of The White Stripes and The Raconteurs.

The three musicians recount how they came to play the guitar in the first place, what their influences were and how their style of play differed from others.