An Air Force communications satellite has suffered a cost breach so significant that the defense secretary must certify that the asset is needed for national security, the air service announced today. The Air Force notified Congress Sept. 5 that the Advanced Extremely High Frequency satellite program exceeded a critical breach in the Nunn-McCurdy statute -- which places caps on single-unit cost growth for all major Defense Department acquisition programs -- prompting an assessment of the program by the Office of...