It said "On 25-10-1967 near Truc Bach lake soldiers and people of Hanoi had captured John Sney Macan major of American Air Force who piloted an A-4 fighter jet which had been shot down near Yen Phu Power Plant. This is one of the 10 jet shot down in the same day."

This monument shows a pilot, presumably Mccain, raising his hands in surrender. Mccain was referred to by "tên John Sney Macan". "tên" which is a word used to indicate villain, his name is misspelled (probably unintentionally) and he served in the Navy, not the Air Force.

Also, for FYI, McCain does know about this monument. In fact, he received a photo of this monument as gift from Pham Quang Nghi, municipal party committee secretary of Hanoi when Nghi visit the U.S. for a diplomatic trip. The photo showed this monument together with many people resting and chatting nearby. To which, Mccain only expressed disapproval that the monument got it wrong about the Navy - Ari Force stuff.

Edit: Mccain flew an A-4, not F-4