professor nicholas barr of the london school of economics.p has criticised the fbi for missing warning signals about wednesday's school shooting, describing it as unacceptable. in a tweet, he said the fbi's failure to stop the gunman, nikolas cruz, were because it was spending too much time investigating allegations of russian interference in the presidential election. he said the fbi needed to get back to basics. thousands of people in florida, including survivors of the shooting, have taken part in a rally to demand tighter gun controls in the united states. the event took place outside the court building in the city of fort lauderdale, a short distance from the school where cruz killed 17 people. laura westbrook reports. chanting: no more! outside the federal courthouse in fort lauderdale, this was the message to lawmakers. among the protesters was emma gonzales, who took cover on the floor of her school's auditorium as a gunman started shooting. she had this to say to donald trump. if the president wants to come up to me and tell me to my