"Green"/Biofuel for USAF and Navy aviation...

[raketenjagdpanzer]

Part of the big problem in T2k is of course the near lack of aircraft on either side...I imagine that what's left of the US military holds back some avgas for emergency contingency purposes here and there; at least in my head-canon, the handful of Tactical air units in Europe at least have scraped together enough to hold off an "end times, now-or-never" type counterattack, plus keep the engines periodically spun up.

Stateside there likewise might be a few B52s (3-5) and perhaps a B1 and B2 remaining in terms of strategic air power, but, again, held out for an absolute emergency situation.

There's been some talk over the last few years about "ATJ" or "Alcohol to Jet" biofuels, that are essentially the same as the "brewed" fuels (probably filtered to a higher purity, though) that are already in use in ground vehicles in T2k - so I would think that this could be discovered and put to use during the reconstruction phase in the US; the ability to shift supplies via air would be a huge, huge asset.