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"was she criticizing his Views or the fact he was Handicapped?

- If memory serves, Cullen had made the point that many wounded veterans (such as himself) had been injured by US land mines - the implication being that the war was so incompetently managed that the US was careless enough to blow up it's own soldiers. It's at that point that Anne made her remark, so she was in fact criticizing his views and not his handicap.
As it turns out, the Viet Cong had a practice of recovering and/or cannibalizing parts from US mines that they found and resetting them to kill Americans. So Cullen was not correct in his charge of incompetence but he was correct to say that US mines were being used to kill American soldiers.
It's the old story that a good lie always contains a grain of truth.