And finally, the supertugs are used to move aircraft that are broken: "A failed engine, a loss of hydraulics in a steering gear, a flat tire on an active runway—we'll tow those out of the way to get fixed." Alas, Mr. Jones seemed not as dis­tracted as I by nearby ramp traffic: a Lisbon Cleaning Services van, three black Pontiac Bonnevilles disgorging VIPs, the FAA's Ford Expedition, a Dobbs catering truck, a 12-car luggage train, a helicopter hovering in front of the Continental hangar, the jet blast from a passing America West 737, an MD-80 being pushed back for service, a Delta sewage truck, a Northwest fuel tanker, four sta­tionary Hobart generators plus attendant electrical cables, a pair of de-icing trucks with cherry pickers retracted, a small lake of spilled hydraulic fluid, and…