Although I wasn't able to get a visa for Vietnam, I was able to talk with swift boat veterans to get a feel for the time and place, and I visited a tropical prison in the Philippines to get a sense of what a Vietnamese prison might have been like.
-- Tony Hillerman
   
Tony Hillerman   Name:
Tony Hillerman
Type:
Author
Nationality:
American
Birth:
May 27, 1925
https://www.nutquote.com/quote/Tony_Hillerman