everybody was on high alert. now the fear as i imagine, the authorities have, is the rest of copycat attacks, someone who wanted to make this very public and wanted to broadcast this live on social media and make a big thing out of it. what is the risk of copycat attacks and are authorities thinking about that? >> i've got to tell you that was the first thing i thought when i saw the first reports coming into the country of what happened, copycats here in america. very concerned about that because it takes something like this to be the trigger. and individual looking to commit such an act like this. i'm sure police worldwide not only in the united states but going through the databanks they