The Navy has awarded a landmark weapon system contract to General Dynamics Electric Boat, a potential $5.1 billion deal that commits the government to proceeding with development of a new-generation ballistic missile submarine and pressing ahead with a $127 billion modernization program that is on course to squeeze future funding for conventional Navy modernization plans.

The Air Force will launch a 12-month review of its science and technology portfolio -- work that is meant to define the service's top research priorities and strengthen partnerships with the scientific community.