It is important to take precautions before traveling to any foreign country you are not familiar with. Travel warnings are issued by the U.S. State Department when it decides, based on all relevant information, to recommend that Americans avoid travel to a certain country. Countries where avoidance of travel is recommended will have Travel Warnings as well as Consular Information Sheets.
 
Consular Information Sheets are available for every country of the world. They include such information as location of the U.S. Embassy or Consulate in the subject country, unusual immigration practices, health conditions, minor political disturbances, unusual currency and entry regulations, crime and security information and drug penalties. If an unstable condition exists in a country that is not severe enough to warrant a Travel Warning, a description of the condition(s) may be included under an optional section entitled "Areas of Instability." On limited occasions, the State Department will also restate in this section any U.S. Embassy advice given to official employees. Consular Information Sheets generally do not include advice, but present information in a factual manner so the traveler can make his/her own decisions concerning travel to a particular country.

Public Announcements are a means to disseminate information about terrorist threats and other relatively short-term and/or trans-national conditions posing significant risks to the security of American travelers. They are made any time there is a perceived threat and usually have Americans as a particular target group. In the past, Public Announcements have been issued to deal with short-term coups, bomb threats to airlines, violence by terrorists and anniversary dates of specific terrorist events.

It is highly advisable to check the status of each of the countries you will be visiting on the U.S. State Department's site at http://travel.state.gov/travel