We have places in London and other places that are so radicalised that the police are afraid for their own lives. We have to be very smart and very vigilant.
Source, in full
As quoted in "Donald Trump claims parts of London are 'so radicalised' police officers are 'afraid for their lives'" by Rose Troup Buchanan, The Independent (8 December 2015); also in "'Trump's not wrong – we can't wear uniform in our OWN cars': Five police officers claim Donald Trump is RIGHT about parts of London being so 'radicalised' they are no-go areas" by Martin Robinson, Daily Mail Online (9 December 2015)