A White House official's call for the U.S. military, agencies and industry to boost accountability for cybersecurity has after a month elicited only a terse comment from the Defense Department, but the Pentagon is taking initial steps to address the thorny problem, according to documents and a former DOD policy chief. Eric Greenwald, the White House's senior director for cybersecurity -- and a former deputy director for operations in U.S. Cyber Command -- urged greater accountability in an Aug. 22...