I have no doubt the C-17 has no problem with a shorter runway. My brother was part of the shakedown team for the then prototype C-17. They would tell every new pilot who got behind the stick of it that, "You can't flare this thing, you have to fly it into the ground." Like clockwork every first landing attempt a pilot would make they would attempted to flare just before touching down and they would execute an unintentional touch and go. So much lift...Yup. That was the C-17