 that could take days. Oftentimes they do when the evidence response team, the ERT, comes in from the FBI. Oftentimes they'll use cameras to electronically recreate the scene where they can do it on computers and get a digital image of what it was like in that moment. We also tonight have been talking to John Cohen, former DHS undersecretary and ABC News consultant, and I asked him, did something fail tonight? Well, they will be taking a hard look at the Secret Service and DHS broadly and