Lockheed network hit by major disruption

Lockheed Martin, the Pentagon's No. 1 supplier, is experiencing a major disruption to its computer systems that could be related to a problem with network security, a defense official and two sources familiar with the issue said on Thursday.

Lockheed, the biggest provider of information technology to the U.S. government, is grappling with "major internal computer network problems," said one of the sources who was not authorized to publicly discuss the matter.

A second source, who also asked not to be identified, said the issue was "affecting a lot of people" at Lockheed, maker of the stealthy F-22 and F-35 fighter planes and other critical weapons systems.

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