In this image made from video provided by Russian State Television Rossiya, an investigator works at the wreckage of a private jet which collided with a snowplow at Vnukovo airport in Moscow, Tuesday, Oct. 21, 2014. The head of French oil giant Total SA and three French crew members were killed at Vnukovo airport when a corporate jet, the French-made Dassault Falcon 50, collided with a snowplow, Russian investigators said Tuesday.