CANBERRA (Reuters) - Two award-winning filmmakers working on a documentary with renowned Hollywood director James Cameron were killed in a helicopter crash in Australia on Saturday, according to National Geographic. American cinematographer Michael deGruy, 60, and Australian TV writer-producer Andrew Wight, 52, were killed when their helicopter crashed shortly after takeoff from an airstrip south of Sydney, the media group said on its website. Police did not release the victims' identities immediately. ...