The Defense Department will penalize Lockheed Martin for management problems by curtailing payments under the latest multibillion-dollar, low-rate production contract for the F-35 Joint Strike Fighter. The Defense Contract Management Agency today sent Lockheed a letter announcing plans to curb DOD payments by 2 percent for the $4 billion deal, which covers the F-35's fifth lot of low-rate production, Lockheed spokesman Joe Stout told InsideDefense.com . DOD estimates the withholding will amount to approximately $1 million per month. "The DCMA...