The USAF is looking at buying new build F-16s and F-15s to fill the gap:

The Government Accountability Office (GAO) published a new report today that for the first time reveals how US Air Force plans to deal with a fighter shortfall that is expected to reach 200 jets by 2025.

The GAO report summarizes two mandatory reports the USAF delivered in March to Congress. There are four options:

1. Extending the service life of and modernizing about 300 F-16 aircraft
2. Increasing annual F-35 procurement above 80 aircraft per year
3. Procuring new upgraded variants of legacy aircraft such as the F-16 and F-15
4. A combination of options 2 and 3

The fact that the USAF has even considered resuming F-16 and F-15 orders could be very significant. Two decades of USAF leaders have consistently upheld the all-stealth rule for combat aircraft.

Significant is an understatement.

The USAF has been doing its level best to create a fighter shortfall for the past 15 years or so in order to force a move to an all-stealth force.

The fact that the situation has gotten so dire that the USAF is considering buying some Eagles or Vipers is a big deal.

It indicates that the budget pictures on the F-35 are even grimmer than previously understood.