says a fight back is underway. what is driving the violence, and what will be done to stop it. a live report from london coming up. jenna: major developments in the search for these three siblings accused of a violent crime spree. where investigators are focusing their search for the dangerous fugitives and why. >> these individuals are considered armed, dangerous, and we believe they pose a very imminent threat to the community we serve and law enforcement in general. jon: mark your calendars, thursday night is the big one. rick folbaum is at the desk with all the information. >> reporter: it's the republican debate on fox news channel. our friend bret baier with all of the action, again beginning at 9:00 eastern time. this debate is cosponsored by fox news channel, by the washington examiner, and by the iowa state republican party. you can watch it on fox news channel and chat with me live at fox news.com.