Police teams were dressed in snow gear Friday, holding the trigger guards on their assault-style rifles while scouring eight square miles near Big Bear Lake, a popular skiing area two hours east of Los Angeles.

CNN: February 9, 2013 -- Updated 1735 GMT (0135 HKT)

Despite the massive security at Woodhill, there have been numerous assaults on guards who at times have had to put on full riot gear.

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Police, some of them in SWAT gear, carried assault rifles on their shoulders, their fingers on the trigger guards.

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Teams from the army, the fire service and border guards are still working around the clock at the site to find survivors, using heavy lifting gear, tools and their bare hands.

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