Cyber warfare expert John Bumgarner claims that the Stuxnet and Duqu virus have been active for much longer than previously suspected, he says that they are active in different variant since 2006. StuxNet has been discovered in 2010 and has been developed to attack Siemens PLCs whose use is widespread in the control systems of centrifuges for uranium enrichment. The most alarming Duqu feature is its modularity, which would indicate that the malware has been designed with the intent to be scalable in its offensive possibilities.”]