Austin, Texas' rabble-rousing rockers White Denim and rock-fracturing stadium-gazing Scots Biffy Clyro have joined the bill for this year's Iceland Airwaves music festival. The SXSW/Camden Crawl/Great Escape-like festival takes place in less than four weeks time (October 15th-19th) and will see some of the year's finest acts play live, DJ and party across the length and breadth of Reykjavik.