Security industry experts are beginning to react to todays news of the massive data breach at the U.S. Office of Personnel Management. Theft of personal and demographic data allows one of the most effective secondary attacks to be mounted: direct spear-phishing to yield access to deeper system access. The Pentagon has a new cyber strategy that specifically calls out retaliation as a viable cyber option not only in response to an attack, but also as a principal factor of deterrence, experts say.”]