From Wiki.....
McCain was immediately offered a chance to return home early:[35] the North Vietnamese wanted a mercy-showing propaganda coup for the outside world, and a message that only privilege mattered that they could use against the other POWs.[39] McCain turned down the offer of repatriation due to the Code of Conduct of “first in, first out”: he would only accept the offer if every man taken in before him was released as well.[41] McCain’s refusal to be released was even remarked upon by North Vietnamese officials to U.S. envoy Averell Harriman at the ongoing Paris Peace Talks.[35]
I saw it in this thread:
http://www.freerepublic.com/focus/f-news/1962874/posts
I don’t know what to make of it, but it is pretty serious if true.