American POWs abandoned in withdrawal from Vietnam? Don't ask McCain!

Does being a war hero require lying for the State?  Hard to believe the American people would knowingly elect a war hero so loyal he would collude in writing off hundreds of men because their existence had become embarrassing to two governments:

"John McCain, who has risen to political prominence on his image as a Vietnam POW war hero, has inexplicably worked very hard to hide from the public stunning information about American prisoners in Vietnam who, unlike him, didn't return home.  Throughout his Senate career, McCain has quietly sponsored and pushed into federal law a set of prohibitions that keep the most revealing information about these men buried in classified documents."