While some airports began to target passengers based solely on their Middle Eastern origins, others instituted random searches instead. Ask your professor if you can use personal pronouns in your writing, and hook readers with a personal story which not necessarily should be yours. Start your essay with a quote from books you review, and it will establish your authority as a writer.
The same can be said for quotes, statistics, and other kinds of information concerning your topic. Check out this article: don't you want to learn more about where tattoos have come from and what they mean?
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It's just the way to let your reader think. Such people are worth listening. Note that most introductions generally only include references if definitions are taken from an information source.