normally be received from U.S. security authorities. They may also be received through the security agencies of the host countries concerned. Infor- mation may also come from local police forces or be received directly by a U.S. command or agency as a threat or warning from a terrorist organization. The declaration of a THREATCON, in- cluding the security measures it requires, may be decreed by a U.S. command or agency or  by  a  local  commanding  officer  or  head  of an agency following receipt of intelligence through  official  sources  or  following  an anonymous threat message. The Alpha, Bravo, Charlie, and Delta THREATCONs are described in the following paragraphs: • THREATCON  ALPHA—This  condition is a general warning of possible terrorist activity, the nature and extent of which are unpredictable. The circumstances do not justify the declaration of  a  THREATCON  BRAVO. • THREATCON  BRAVO—This  condition is declared when an increased and more predictable threat of terrorist activity exists even though no particular  target  is  identified.  The  security measures required during this condition may have to be maintained for weeks without causing undue hardship, without affecting operational capability, and  without  aggravating  relations  with  local authorities. • THREATCON CHARLIE—This condition is declared when an incident occurs or when intelligence is received indicating that some form of terrorist action against an installation or personnel is imminent. The security measures required during this condition for more than short periods will probably create hardship and will affect the peacetime activities of the installation and its personnel. • THREATCON DELTA—A terrorist attack has occurred or intelligence has been received that terrorist action against a specific location is likely. Normally, this THREATCON is declared as a localized warning. Each naval installation or command provides instructions on the measures its personnel should take during each of the four THREATCONs. THREAT ASSESSMENTS Based on available information, your command must determine if the threat is going to be a short-, medium-, or long-term threat. Although the Naval Investigative Service (NIS) can supply those threat evaluations on request, they must be carefully analyzed to determine the required THREATCON level. SAFEGUARDS  AGAINST TERRORISM Department of Defense (DOD) policy is to protect to the best of its ability DOD facilities, equipment, and personnel and their dependents from terrorist acts. Particular attention is given to informing and protecting high-risk targets. High-risk targets include the following: Key DOD personnel U.S. Military Assistance Advisory Groups (MAAGs) and other military missions Technical assistance field teams Training and advisory teams Defense attaché offices Nuclear weapons sites Recruiting  offices Small communications, liaison, and admin- istrative activities considered to be especially vulnerable to terrorist acts Absolute protection against terrorist activities is impossible. Therefore, protective plans and procedures are based upon a balance between the degree  of  protection  desired,  mission  require- ments, and available manpower and fiscal resources. The most cost-effective, broadly based method of organizing an antiterrorism effort is to integrate it as much as possible with crisis management procedures. Those procedures should set up ways to prevent, control, or contain natural and man- made crises. Essentially, specific antiterrorism 8-3