As top Pentagon officials continue to discuss how to cut the cost to develop the Army's multibillion-dollar Ground Combat Vehicle, the Congressional Budget Office has released a report highlighting a variety of challenges facing the program -- singling out the nascent technology associated with active protection systems. The report, "Technical Challenges of the U.S. Army's Ground Combat Vehicle Program," states that many of the developmental hurdles facing the program stem from the service's required level of protection, which has driven...