Know your rights
Most PJs take media law courses. However, many non-media photographers are concerned about their right to make photographs. This is particularly of concern in post-9/11 America, where some would like to use fear to exert illegitimate power over others.
If you aren't certain of your rights as a photographer or citizen, read this one-page report on photographers' “Rights and Remedies When Stopped or Confronted for Photography” by Bert P. Krages II, an Oregon-based lawyer. He is also the author of the book
“Legal Handbook for Photographers: The Rights and Liabilities of Making Images.”
It puts most concerns to rest.
Enough for now,