'21st Century Breakdown' is the eight studio album from American punk trio Green Day coming 5 years after hugely successful 'American Idiot' album topped charts around the world and spawned the hit singles 'Jesus of Suburbia', 'Boulevard of Broken Dreams' and 'Wake Me Up When September Ends'. The album has been split into three sections 'Act I - Heroes and Cons', 'Act II - Charlatans and Saints' and 'Act III - Horseshoes and Handgrenades' and the lead single is a track called 'Know Your Enemy'