reminder of the many vehicle borne attacks carried out in the past blues not the first time they threaten the vatican. in august they published a video showing jihadists destroying church statues saying remember this, we will be in rome. and ripping up photos of the pope. christmas has been a target for the terrorists. last year in berlin a 32 ton truck was intentionally driven through the city s christmas market before crashing into a crowd shopping, 12 that and wounding 49 was nothing new from isis. encouraging supporters to lunch attacks. christmas a target for them this year and security centers around the world does christmas. heather: you wrote a book about taking aim at isis. what do you think of the threat