yard. employees who have not arrived to work are told to stay at home at this time. authorities on the scene were responding to initial reports of a possible active shooter on the loose in the washington navy yard. we have seen a huge response by federal and local law enforce lt officials as well as ambalances and helicopters above. we should make it clear, again no confirmation of a gunman or gunpet shots heard at this time. there are no reports of injuries. i want to bring in analyst and former fbi profiler clint van zandt. thank you very much for joining us. >> yeah. >> i was wondering in a situation like this what is the initial response aimed at trying to do? >> well i think you've got a two-level response. number one, you have the normal response you would get to a potential shooting. obviously, it was in september 2013, there was an actual shooting in the d.c. navy yard. as you recall that was a 34-year-old contract worker with