Helicopters have one of the most recognizable sounds in aviation. The signature "whop whop" or deep thumping sound announces its arrival long before it appears in the sky. It's a sound so iconic, it's ...

A helicopter spun out of control and crashed into palm trees at Huntington Beach, leaving five hospitalized and shocking onlookers.

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Two people onboard the helicopter and three people on the street were hospitalized for injuries suffered in the crash.