There are two ways that people become aware of a threat. The first, which is referred to as top-down processing, is when a person intuitively realizes that there is something wrong and makes a decision without needing to observe the details and cues that caused them to make that realization. The second method, the bottom-up approach, is certainly the more difficult of the two, as it requires that a person can recognize a series of subtle anomalies before making a decision. To identify patterns of behavior through intense attention to detail, focus, and strong deductive reasoning, are inherently more challenging than when an anomaly presents itself right in front of us. As the challenge becomes greater, so does the reward for making an accurate and correct prediction. It is the reward for continuous study and learning the subtle details of crimes or attacks that have occurred in the past. This is where we can recognize the patterns that the less aware would have missed.