This must be one of the most spectacular films ever to open the Berlin Film Festival. Martin Scorsese's documentary "Shine A Light" is a tribute to his teenage heros, the Rolling Stones. The director and band members are expected to attend the showing. And that's not the only musical highlight at this year's festival. Punk rock star Patti Smith and legendary songwriter Neil Young also plan to attend the screening of their documentaries. We want to know what's behind this current trend for rock legends at the movies.