The catastrophe immediately raised questions about the close proximity in which helicopters and jetliners soar over the busy ...

Weather reports from the time show a mix of rain and snow, and the aircraft flew over a remote ... which may have been hard for the pilot to see in the dark, could have caused the crash, said ...

Dark skies and bad weather caused a helicopter crash ... was among the six people on board when the aircraft went down shortly after 10 pm in Southern California's Mojave Desert.