Ian Hitchcock/Getty ImagesThe five Marines who died in a helicopter crash during a training mission Tuesday were identified by the U.S. Marine Corps on Friday.They were Capt. Jack Casey, of Dover, New Hampshire; Lance Cpl. Donovan Davis, of Olathe, Kansas; Sgt. Alec Langen, of Chandler, Arizona; Capt. Benjamin Moulton, of Emmett, Idaho; and Capt. Miguel Nava, of Traverse City, Michigan, according to a statement from the 3rd Marine Aircraft Wing. The Marines all belonged to the 3rd Marine Aircraf