Capitalizing on a failure Background July 17, 1996, East Watertown, NY—As part of regularly scheduled maintenance, a Niagara Mohawk Power Corporation (NIMO) service crew had just de-energized the East Watertown substation’s transformer and tem- porarily removed the unit from service. In its place, the crew had connected one of the power company’s ?eet of 21 mobile back- ups—a 9-MVA unit with a 30-year history of dependable service. The procedure

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