brian morganstern and lewis.ey're hired to protect, but they sometimes end up killing. i'm talking about arms security guards. wait until you hear what cnn drew griffin discovered in a year long investigation into these hired guns. but, first, we have a preview of the cnn documentary called extraordinary people. it features the man who helped stop a terror attack at the canadian parliament. here's cnn anderson cooper. >> as the shooting began, i moved behind this pillar. >> josh wingrove is a reporter with the newspaper, globe and mail. he captured the most dramatic video of the incident inside. >> the prime minister was right over here. >> prime minister right in there. >> it was a makeshift barricade. >> knowing that the doors couldn't be locked and hearing that much firepower was really shocking. >> freeman was one of those parliament aarons. >> it was an intense moment for everyone within the room. we, you know, hid under desks. >> no, no, no, no. >> great. no. >> i think we were all afraid for our lives. >>