Surveillance

Someone recording or monitoring activities. This may include the use of cameras, note taking, drawing diagrams, annotating on maps, or using binoculars or other vision-enhancing devices.

Elicitation

People or organizations attempting to gain information about military operations, capabilities, or people. Elicitation attempts may be made by mail, email, telephone, or in person. This could also include eavesdropping or friendly conversation.

Tests of Security

Any attempts to measure reaction times to security breaches, attempts to penetrate physical security barriers, or monitor procedures in order to assess strengths and weaknesses.

Funding

Suspicious transactions involving large cash payments, deposits, or withdrawals are common signs of terrorist funding. Collections for donations, the solicitation for money and criminal activity are also warning signs.

Supplies

Purchasing or stealing explosives, weapons, ammunition, etc. This also includes acquiring military uniforms, decals, flight manuals, passes or badges (or the equipment to manufacture such items) and any other controlled items.

Impersonation

People who don’t seem to belong in the workplace, neighborhood, business establishment, or anywhere else. This includes suspicious border crossings, the impersonation of law enforcement, military personnel, or company employees is also a sign.

Rehearsal

Putting people in position and moving them around according to their plan without actually committing the terrorist act. An element of this activity could also include mapping out routes and determining the timing of traffic lights and flow.

Deployment