A teaser trailer for the upcoming film The Clash Live: Revolution Rock has been made available online here. The DVD film is an exciting new documentary directed by long-time Clash collaborator and Grammy-winning producer Don Letts (Westway to the World) that chronicles the electric live performances of one of the most influential bands to emerge from the UK. PBS will be airing an edited version of the DVD as a Pledge Drive Program in March, with the DVD hitting stores on April 15th. For showing times, check here.