FILE PHOTO: A Chinese naval Z-9 helicopter prepares to land aboard the PeopleÕs Liberation Army (Navy) frigate CNS Huangshan (FFG-570) as the ship conducts a series of maneuvers and exchanges with the Arleigh Burke-class guided-missile destroyer USS Sterett (DDG 104) in the South China Byron C. Linder/Handout via REUTERS/ File photo
