He starts off with:
five miles across the Cambodian border
And then he proceeds to confirm the apparent meaning:
The absurdity of almost being killed by our own allies in a country in which President Nixon claimed there were no American troops was very real."
There's the "in" and he clearly meant "Cambodia".
Carl Cameron with Fox went to the Kerry campaign yesterday asking about Kerry's saying he had been in Cambodia and they denied he said it and meant "near". Then Cameron confronted them with the letter I am referring to from 1979 and the Congressional Record of 1986 in which the context seems clear, if more parsable, that Kerry was telling the same tale.
I contend the 1979 Boston Herald missive is pretty darn plain in its meaning. The Kerry camp has still not gotten back to Cameron on an explanation.