I agree. We should have a special body of people trained explicitly to deal with violent behaviour and threats to life, such as men wielding knives and similar

I agree. We should have a special body of people trained explicitly to deal with violent behaviour and threats to life, such as men wielding knives and similar weapons. They should be given training and equipment to disarm, or otherwise neutralise,such threats, without putting anyone's lives in danger, their own, the general public's, or the people acting in a threatening manner.