call out alla akbar and also talk about aleppo, they don't really know necessarily what the motives are, president-elect trump going a little further and labelling this an act of islamic terrorism, i think we'll know more in the coming hours and days about who this person was and why they did it. but certainly president-elect trump has said that it's islamic terrorism, don? >> thank you, elise lav it. i want to bring in now, michael weiss, a co author of inside the army of terror, national security analyst the author of security mom. and jill dougherty and bob baird. let's start in berlin, shall we. this looks similar to the bastille day attack in france. are we going to see more of these attacks?