Last Navajo Code Talker Chester Nez dies aged 93
5 June 2014 Last updated at 15:11 BST
The last of the 29 Navajo Americans who developed a code with their native language to encrypt military messages during WWII has died.
Chester Nez, 93, of Albuquerque, New Mexico, died of kidney failure on Wednesday.
The work of the "Code Talkers" was credited with saving the lives of thousands of US troops in the Pacific.
Judith Avila, who helped Mr Nez write his memoirs, explained to BBC Radio 5 live's Up All Night how the "brilliant" code worked.