The Navy has canceled two prize challenges for its Marine Air Ground Task Force Unmanned Expeditionary program so the service can re-evaluate requirements. A Marine Corps spokesman said the service terminated the prize challenges as it launches a requirements review to ensure the program supports the Commandant's Planning Guidance, a strategic document Marine Corps Commandant Gen. David Berger unveiled this summer. The Navy posted cancellation notices for the designs of systems architecture and payload adapter prize challenges on Dec. 11...