"This publication is intended for American private sector organizations and their personnel abroad… Effective security precautions require a continuous and conscious awareness of your environment. This is especially true when visiting a foreign country where it will be necessary to adapt to new cultures, customs, and laws which, in many instances, are very different from those to which Americans are accustomed in the United States. The implementation of security guidelines contained in this publication should reduce the vulnerability of American private sector personnel traveling abroad to criminal or terrorist acts. Individuals should ensure, however, that any approach chosen is best suited for their individual situation."
State Department: http://www.state.gov/documents/