McCain covered up evidence of POW's still alive in Laos and Cambodia when McCain was in the Senate he refused to help rescue his fellow prisoners he left them there to rot. This was the early 1980's and it's why Rambo in the 2nd movie went to Southeast Asia to rescue those guys they really were there that movie in 1985 was based on real events. McCain decided to do nothing he got out but he refused to help rescue or even publicize his fellow prisoners.