Sky News Police have adopted a new strategy to deal with Paris-style terror attacks, with less of a focus on negotiations when people's lives are at risk: http://trib.al/BaxDzA2 Armed officers simulated an attack on a London shopping centre on Tuesday, firing blank ammunition.

Police have adopted a new strategy to deal with Paris-style terror attacks, with less of a focus on negotiations when people's lives are at risk: http://trib.al/BaxDzA2 Armed officers simulated an attack on a London shopping centre on Tuesday, firing blank ammunition. Sky News It's all about realistic worst case scenario training. Are you ready for ISIS?