and specifically today, but we also have done a lot of training to get law enforcement and public safety ready for this. and that state department alert was based on credible information about possible isis attacks in association with the upcoming holiday season and certain events. i want to go back to reporter fred pleitgen who is there at the attack on berlin. fred, tell us what you re seeing there. reporter: hi, jake. as you can see behind me, there is a lot of ambulance vehicles here. you can also see that even about two hours and 15 minutes after this attack took place, there are still new ambulances coming in here. you can see there is a fire truck also coming out. so there s still a lot of movement here on the part of the authorities trying to come to grips with the association. we ve been speaking with a couple eyewitnesses on the ground and they just spoke how horrible those moments were when that truck came through there.