A party at Microsoft Chairman Bill Gates' waterfront mansion recently became the focus of unusual police attention.
The U.S. Department of Homeland Security announced a "temporary security zone" earlier this month around Gates' Lake Washington home, saying in a notice published in the Federal Register that the move was necessary to prevent "terrorism, sabotage or other subversive acts."
Security zones prevent any person or watercraft from entering the area without explicit government permission. They're normally used to tighten security around military bases and naval facilities, and it's exceedingly rare for them to be erected around a private residence. The reason for the "Gates Residence Security Zone," which locked down all of Lake Washington south of the Highway 520 bridge and stayed in effect for two days, was a private party the Microsoft billionaire threw on July 18.
News source: C|Net News.com