Contractors unwittingly give up secrets, says CIO.

• Position: WASHINGTON PULSE

Pentagon Chief Information Officer John G. Grimes has put industry on notice. Tighten your internal network security, he tells a roomful of contractors. Spies are extracting drips and drabs of highly sensitive information from defense companies, and these pieces of intelligence add up to a full picture of what the U.S. military is doing, Grimes says.

He has already met with the top...