To match Special Report USA-CYBERSECURITY/

 
To match Special Report USA-CYBERSECURITY/
U.S. Air Force personnel work in the Air Force Space Command Network Operations & Security Center at Peterson Air Force Base in Colorado Springs, Colorado in this July 20, 2010 file photo. The Pentagon is about to roll out an expanded effort to safeguard its contractors from hackers and is building a virtual firing range in cyberspace to test new technologies, according to officials familiar with the plans, as a recent wave of cyber attacks boosts concerns about U.S. vulnerability to digital warfare. The twin efforts show how President Barack Obama's administration is racing on multiple fronts to plug the holes in U.S. cyber defenses. To match Special Report USA-CYBERSECURITY/ REUTERS/Rick Wilking/Files (UNITED STATES - Tags: MILITARY SCI TECH)