(Lenny Ignelzi | The Associated Press) In this Sept. 28, 2015, file photo, former United States Marine and Navajo Code Talker Roy Hawthorne Sr. listens during a ceremony honoring the code talkers' contribution to the World War II U.S. effort, at Camp Pendleton, Calif. The Navajo Nation says Hawthorne Sr. died Saturday, April 21, 2018. He was 92. Hawthorne enlisted in the U.S. Marine Corps at age 17 and became part of a famed group of Navajos who transmitted hundreds of messages in their language without error. The code was never broken.