Boeing, prime contractor for the Ground-based Midcourse Defense system, has warned government auditors that if the Missile Defense Agency breaks the current contract used to manage the homeland defense system into smaller projects as the Defense Department is currenting considering, then the company could lose "irreplaceable" personnel with experience and expertise on the program. The Government Accountability Office submitted this finding to lawmakers in an Oct. 21 report , revealing one of the vexing challenges Pentagon officials face in determining...