Hỏa Lò Prison (English Wikipedia)

Stuart I. Rochester, Frederick T. Kiley (2007). Honor Bound: American Prisoners of War in Southeast Asia, 1961–1973. p. 96. "There is disagreement among the first group of PWs as to who actually named Hoa Lo the Hanoi Hilton, but the nickname ... the message "Welcome to the Hanoi Hilton" on the handle of a pail to greet the arrival of Air Force Lt. Robert Peel."

clarionledger.com

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Parker, Adam (2008-10-19). "Former Vietnam POW recalls ordeal, fellowship". The Post and Courier. Archived from the original on 2011-10-06. Retrieved 2009-06-27.
Mahler, Jonathan (2005-12-25). "The Prisoner". The New York Times Magazine. Archived from the original on 2017-05-10. Retrieved 2017-02-09.
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"F-100 Pilot Hayden Lockhart – The First USAF Vietnam POW". Super Sabre Society. Archived from the original on 29 September 2017. Retrieved 16 April 2020.
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