Per AvWeek, today, Lockheed has managed to nix over a ton of weight from then F-35B. It was about 2,200lbs overweight, before. They also increased engine thrust. USAF
is now going ahead with their F-35B purchase, constituting "several wings" or "hundreds" of aircraft. The USAF
version will have some differences from the USMC
F-35B, such as internal cannon, larger wing, and a different inflight refuelling system.
When they call the roll in the Senate, the Senators do not know whether to answer 'Present' or 'Not guilty.' -Theodore Roosevelt