The excerpt clearly states that he obtained a Journalist Visa. In the absence of any evidence in the excerpt to the contrary, we can safely infer that he is a journalist.
He stated that he believes what his country is doing in Vietnam and goes on highlight United States' attempt to flush communist guerilla insurgency out of Vietnam.
<u>From the above points</u>, therefore, one can strongly infer that the author is a United States journalist who is convinced of the steps the Unites States government is taking in Vietnam.
