'Avengers' Use Imagination at Tribeca Premiere

Stars of Marvel's The Avengers assembled for New York's Tribeca Film Festival closing premiere of the summer blockbuster, in theaters Friday, with stars Chris Hemsworth, Mark Ruffalo, Tom Hiddleston and Cobie Smulders weighing in on the superhero saga and the power of imagination. Watch the video! Video: ET's 'The Avengers' Review! Bombay Sapphire launched their Imagination Series Filmmakers Competition at the festival -- offering budding filmmakers the chance to make their own short film using