LOS ANGELES, Jan. 2 (Xinhua) -- Four people were killed after a private helicopter crashed in a mountainous area of the U.S. state of Arizona on Friday, authorities said. The Pinal County Sheriff's ...

LOS ANGELES, Jan. 2 (Xinhua) -- Four people were killed when a helicopter crashed Friday in the remote mountains of the U.S. state of Arizona, officials said. Enditem ...