The IAI answer is robotics. In other words, the UAV flies itself. The robotics of the larger UAVs is so good that they can operate from regular airports, fitting in with normal traffic and even responding to a takeoff clearance. The UAVs depart with the anticipated mission programmed into memory, but if the situation changes, new instructions can be sent while the UAV is in flight. But, the basic flying tasks, including the landing and recovery, are automatic.