Officials say hackers didn't steal critical data about new fighter jet

The Pentagon and Lockheed Martin, the lead defense contractor for the new F-35 Joint Strike Fighter, suggested yesterday that cyber-attacks had not caused any serious security breaches in the Pentagon's most expensive weapons program. Still, defense and corporate officials said attacks on the Pentagon as well as the F-35 program are constant, and former defense officials familiar with the program said some of the F-35's less sensitive systems have been infiltrated by cyber-intruders.

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