Air

The U.S. homeland is vulnerable to air and missile attack across the Arctic because the network of ground, air, and space-based defenses guarding those approaches have atrophied over time, according to a new paper from AFA’s Mitchell Institute for Aerospace Studies. 
Even after reducing the scope of Block 4 F-35 upgrades, Lockheed Martin will still needs two years to develop and install planned improvements, the Government Accountability Office said in a new audit of the fighter program. Details about what upgrades will be carried into production, ...