EMC announced that it has closed the deal to buy NetWitness, adding a forensics-focused set of tools to its security monitoring arsenal. NetWitness tools enable security technicians to collect and analyze detailed information about network events. EMC said the transaction “is not expected to have a material impact to revenue or [earnings per share] for the full 2011 fiscal year” NetWitness will become a core element of RSAs Advanced Security Management Solutions, providing real-time visibility into network activity.”]