His crew members have confirmed they were operating in a section of the river where one bank was Cambodia, the other Vietnam. That's how S. Vietnamese forces could be taking pot shots at them. Kerry's recollection might be off a little about events but that is scant evidence to brand someone a liar.
Compare the charge to the Slimies slander that has government documents that cleary contradict their claims.
(See JF, documents are evidence not conjecture.)
His sector was 55 miles from Cambodia. He wasn't operating anywhere near Cambodia.
