The 15 Marines and a Navy sailor killed in a military plane crash earlier this week in Mississippi -- the deadliest Marine air disaster since 2005 -- came from around the country. All had different life stories with one common denominator: they were heroes. Their identities were officially released Friday as the nation mourns with their grieving families.
Investigators are working to determine what caused a Marine Corps refueling plane to crash in a Mississippi soybean field Monday. The crash killed all 16 service members on board.