Hi, Sorry if this has been asked before. Gravity probe B showed that a rotating mass actually drags space along with it. I was wondering, does dragging space actually cause drag on the rotation velocity of an Object? If it does, I would assume this dragging of space effect also effects any object in motion, but instead of rotating space, would act like resistance, eventually slowing any object in motion. If it does not, then warping space does not require any energy, thus making any ideas of warp drives for propulsion futile :( I'm hoping my logic is wrong on that last one.