Cyberdefense essential extension of national security Summary: Governments worldwide are investing in cyber armies and intelligence to counter growing online threats. By Tyler Thia | June 14, 2011 -- 03:51 GMT (20:51 PDT) Loading... Please wait. http://download.asia.cnet.com.edgesuite.net/zdnetasia/sr_cyberwarfare.flv Topics: Security, CXO, Government, IT Employment Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.