This article discusses how on one occasion, the pilot of Air Force One, the personal air transport of the President of the United States, was required to perform evasive manoeuvres to avoid presumed hostile fighter aircraft over Syria. In reality, the Syrian aircraft were friendlies and their military authorities had merely failed to properly communicate their intent. But nevertheless, it shows, and is logical, that the pilots of these converted civilian aircraft are required to learn and perform techniques that would never be used in the intended civilian operation of these aircraft.
How do pilots learn to fly an airliner, like the VC-137 in use at the time of this anecdote, or in the present day a 747, beyond its intended use and presumably with a high risk of failure? Does the United States Air Force retain identical aircraft not routinely used as Air Force One, for specific training use? Otherwise, how is it determined that these manoeuvres are feasible in such an aircraft and that the pilot is capable of performing them?