Dramatic scenes as SWAT teams close down part of LA in 'terror alert'... but don't worry, it's just a drill

SWAT team members engaged actors and police officers pretending to be terrorists during a live counter terrorism demonstration for the 2013 National Homeland Security Conference, on the streets of downtown L.A. on Thursday. Spectators gathered to watch as an actor pretended to detonate a suicide vest and SWAT team members and pretend terrorists shot at each other.

http://www.dailymail.co.uk/news/article-2337252/Dramatic-scenes-SWAT-teams-close-L-A-terror-alert--dont-worry-just-drill.html