HANOI, Vietnam -- Sen. John McCain paid a quiet visit to the "Hanoi Hilton" prison where he was held for more than five years during the Vietnam War on Wednesday, making a few deadpan remarks as he made his way through dark corridors and past musty cells. McCain allowed reporters to follow him while he escorted Sen. Amy Klobuchar of Minnesota and Sen. Lindsey Graham of South Carolina through the prison. -snip-