And “third party” transfers are prohibited and require US approval before they can ship to Ukraine.
And setting up the logistical supply train is a huge undertaking, oh, and jumping from one jet to another isn’t like swapping cars. Each jet type has completely different systems and performance characteristics. Takes long time for the pilots to learn the systems and learn to fly it.
And setting up the logistical supply train is a huge undertaking,
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Supplies already exist in Europe. F16 Training last 1 year.