Businesses need to look at security as a military exercise, expert says. Retired U.S. Army colonel Barry Hensley is vice president of Dell SecureWorks’ Counter Threat Unit. He recommends using a military combat concept called observe, orient, decide and act (OODA) “If you can OODA before the enemy can, I believe you can defend a network,” he says. He says some attackers test their tools against one industry to see how well it does before going after their actual targets.”]