Dick Oliver described a drone aircraft that is guided electronically to its target without having a pilot. He was on the ground and saw something consistent with the several live shots that recorded the foreign object that floated from the west to behind the towers.
The circular object was filmed by nbc, cbs, wb11, and ny1. It had no physical components of a chopper or plane and was much smaller than a helicopter.
Dick Oliver Says Plane Was Remote Control Drone - YouTube