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An American Airlines flight that had departed from Wichita, Kansas, was coming in for a landing when it collided with a Sikorsky H-60 Black Hawk helicopter on Wednesday evening.

The helicopter was a Sikorsky H-60 that took off from Fort Belvoir in Virginia with three soldiers on board, and belonged to B Company, 12th Aviation Battalion.

Rain has worked with Lockheed Martin company Sikorsky and with fire officials in Orange County in the hopes of bringing its technology into operational use.

It was the second fatal crash for Marines in Southern California involving a Sikorsky CH-53E Super Stallion, a heavy lift helicopter, in the last six years.

The first three of Australia’s Sikorsky Aircraft-manufactured Black Hawks were delivered this month.