Programmed to Kill The Cold Aggression of a Mass Murderer

What goes through a person's mind during a 90 minute killing spree? Once they have decided to engage in the most extreme of acts, killers like Anders Breivik conduct their slayings mercilessly and in cold blood. Psychologists say they enter a primal hunting mode in which their emotions are completely shut down.
Von Cinthia Briseño
Psychologists say a "hunting mode" in his mind enabled Anders Behring Breivik to kill dozens without emotion.

Psychologists say a "hunting mode" in his mind enabled Anders Behring Breivik to kill dozens without emotion.

Foto: REUTERS/ Scanpix Sweden
Photo Gallery: Unity in the Face of Terror
Foto: Frank Augstein/ AP
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Photo Gallery: Unity in the Face of Terror

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