CHAPPAQUA - Firefighters swarmed a house in Chappaqua that went up in flames today as thick, hazy smoke poured through its roof, but it was all in the name of practice.

A homeowner contacted fire officials with an offer to let local fire crews get some real-life training battling a house fire at his home before it was to be knocked down.

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The home was set ablaze using controlled burns, and firefighters practiced searching for occupants in the smoky interior.

Six fire departments participated in the training: Chappaqua, Mount Kisco, Bedford, Bedford Hills, Katonah and Armonk.

The homeowner says a month of planning plus lots of permits and paperwork went into organizing the training event.