The ancient insulated steam pipes that lie under the streets and buildings of New York City are in need of constant repair. They also are very dangerous when they blow, causing injuries, damage, and inconvenience. The steam is vital to the success of the city -- it powers everything from clothes presses to elevators -- as well as the survival of the citizens, who rely on it for heat even in the most modern skyscrapers. The only way to repair the 16-inch pipes is to close off the street and dig up the road to get to the break -- at a cost of about 35,000 dollars at each break. But wait, what's that thing crawling along inside the pipe with a blow torch? A pyromaniacal snake? A fire-breathing dragon? No, it's W.I.S.O.R., the robo-welder to the rescue.