Mark Herrera, World Renowned Security Expert | The Jeff Crilley Show

I think you'll agree with me that it's become a much more dangerous world just in the last couple of years. We weren't thinking about rooftop threats just two years ago, and now everybody is starting to wonder whether we are protected against the violence that could happen from a sniper on a rooftop. To talk about that today is Mark Herrera, a good friend. He's the president and chief security strategist for Global Awareness Professionals.