opened fire. >> i talked to a person who has worked in that building, there was another layer of security inside that building where the gunman entered. we don't know if that is where the shooting began or if he got by that security. >> it is still an active crime scene. as of an hour ago people were still is there in there. it's a crime scene as well. they are gathering evidence. that is one of the questions, how is on one of the most secure sights in washington, d.c. number one with the force protect level so low he was allowed for him the to drive in without searching the car at all. and number two, how do you walk into this building, people carrying weapons, obviously. they will look at the surveillance video and talking to the eyewitnesss involved and others in the building.