Wings Over the Rockies on Instagram: "How POWs Created a Secret Tap Code. A-4 Pilot Everett Alvarez Jr. discusses his time in the Hanoi Hilton and how communication helped him survive his internment. To hear more, check out episode 54 of the Behind the Wings podcast at the link in bio or wherever you listen! #wingsovertherockies #wingsmuseum #behindthewings #podcast #a4skyhawk #pilot #vietnam #pow #hanoihilton"