The National Security Agency's new data center in Utah was built for a 65 megawatt load, making it one of the world's largest data centers. But it has had a rough start. The $1.53 billion data center was built on a "very aggressive" schedule, according to the government, with groundbreaking in early 2011 and completion scheduled by the end of this year. But a report of "meltdowns," "flashes of lightning" and damaged equipment caused by arc faults raised questions about the timetable.