To prepare for the rhetorical analysis, review SOAPSTone, DIDLS, the rhetorical triangles, and the definition of exigence. Keep in mind that you should pay attention to these while you read the passage; don't start to think about them when you begin to write the essay.
To prepare for the argumentative essay, you should review the issues raised by Snowden's case and the nuances of those issues. Any information gleaned from the Frontline documentary The United States of Secrets and Laura Poitras's Citizenfour can be used to supplement, not replace, information presented in Harding's book.
As we have practiced in class, you should lead with your points and avoid restating information in the passage or summarizing the book. Any information from the passage or the book should be used only to support the points you make in the essay.