It's one of the iconic images of the American presidency: the commander in chief, standing and waving to the cameras from the top of the stairs leading into Air Force One.
But recently, President Biden has been avoiding climbing up the sometimes-wobbly 18-foot staircase that is trucked over to the plane's upper door. More often than not, he is using a much shorter and sturdier set of stairs that fold out from the belly of the plane.
