I've met two Vietnam era POWs, CAPT USN Gordon Nakagawa and CDR USN Everett Alvarez, impressive men, humble.
I met Navy Captain Nakagawa while stationed at Camp Pendleton, CA, he was introduced to me as a former POW to which Captain Nakagawa added "twice... Once in my own country". He was a wonderful man, friendly and witty.
http://www.learningforlifeschool.com/#!__scholarships/
Mr. Alvarez is another truly impressive man, I still see him on occasion at Christmas parties.
http://www.cbsnews.com/news/vietnams-last-pows-gather-for-perhaps-a-final-salute/For me, seeing and speaking with these men is a humbling experience.