let's go to tara modele maller. i can say that it does follow a grew some and sickening pattern. >> you're right. we need to be cautious when these things happened. we don't want to jump to conclusions without evidence. we've seen attacks like this that fit the mold of terrorism. terrorist groups have called for these types of attacks. we've seen a few incidents the past year or two that have not been terrorist related. there was a times square incident with a vehicle ramming into a pedestrian area. also an incident by the white house. they were not related to terrorism and involved vehicles. one was under the influence of alcohol and one mentally unwell. too early to say. many things that law enforcement will look like. was the individual making statements that go related to his -- i believe it was a male, his motivation in this case. does law enforcement have information on the individual about his background or potential history with law enforcement. also, they're going to be collecting evidence from the scene it

let's go to tara maller now. spokesperson and senior policy adviser for the counter extremism project. good to see you. >> good to see you. >> shepard: what do you think of this venture? >> it's promising and i'm looking forward to getting people to the table to talk. we're still a long way. a lot of preparation, a lot of planning and expertise that needs to be brought to the table here. this is not a meeting you go into unscripted or into with off-the-cuff remarks. you need a clear strategy and what the united states is willing to give and what we're trying to get and a strategy for getting there. >> shepard: the idea of them talking, are there areas in which the united states can't give that give you concern about how this may come out? >> there are. i don't think the united states is going to go in there with a strategy of turning overturn. my concern is that in order for these parties to get to the table and talk, you don't want president trump to off-the-cuff make promises that the follow-up negotiations and

tara maller, great to talk to you. >> thanks for having me. >> shepard: more on how the united states could launch a strike. we'll hear from jim mattis on his concerns about taking military action. that's coming up from the fox news deck on this thursday afternoon. you might take something for your heart... or joints. but do you take something for your brain. with an ingredient originally found in jellyfish, prevagen is the number one selling brain-health supplement in drug stores nationwide. prevagen. the name to remember. experience a blend of...and raw power,nship... engineered to take the crown. presenting the all-new lexus ls 500 and ls 500h. experience amazing, at your lexus dealer. miracle-gro guarantees results >> vo: these neighbors are starting right. with rich potting mix and essential plant food for three times the blooms. success is sweet. miracle-gro. three times the beauty. one powerful guarantee. >> shepard: jim mattis says that his biggest concern with any potential u.s. strike along with allies apparently on syria is killing civilians while also keeping any conflict