An apparent wave of targeted attacks leveled against U.S. defense contractors this month has experts trying to determine whether the newly revealed attack on Lockheed Martin and others is in any way tied to the breach of RSA’s SecurID token database earlier this year. So far Lockheed is the only defense contractor to come forward, though Raytheon, General Dynamics, and L3 Communications have all reportedly been affected as well. Security experts say this is only the tip of the iceberg. “Recent incidents may just be the beginning,” one expert says.”]