An active shooter situation in an office can be unpredictable and scary. That is why it is important to know ordinary people can be taught to react in ways that can save their lives. David Katz, CEO of Global Security Group, does active shooter training and fire safety training at offices around the world, including Fox 5. Katz invited us to his office space to go over three important things. Just remember ABC: AVOID, BARRICADE, CONFRONT.